| slovo | definícia |
prefix
(mass) | prefix
- predpona, prefix, predčíslie |
prefix
(msas) | prefix
- prefix |
prefix
(msasasci) | prefix
- prefix |
prefix
(encz) | prefix,prefix n: Zdeněk Brož |
prefix
(encz) | prefix,předpona n: Zdeněk Brož |
prefix
(czen) | prefix,prefixn: Zdeněk Brož |
Prefix
(gcide) | Prefix \Pre*fix"\, v. t. [imp. & p. p. Prefixed; p. pr. & vb.
n. Prefixing.] [L. praefixus, p. p. of praefigere to fix or
fasten before; prae before + figere to fix: cf. F. pr['e]fix
fixed beforehand, determined, pr['e]fixer to prefix. See
Fix.]
[1913 Webster]
1. To put or fix before, or at the beginning of, another
thing; as, to prefix a syllable to a word, or a condition
to an agreement.
[1913 Webster]
2. To set or appoint beforehand; to settle or establish
antecedently. [Obs.] " Prefixed bounds. " --Locke.
[1913 Webster]
And now he hath to her prefixt a day. --Spenser.
[1913 Webster] |
Prefix
(gcide) | Prefix \Pre"fix\, n. [Cf. F. pr['e]fixe.]
That which is prefixed; esp., one or more letters or
syllables combined or united with the beginning of a word to
modify its signification; as, pre- in prefix, con- in
conjure.
[1913 Webster] |
prefix
(wn) | prefix
n 1: an affix that is added in front of the word
v 1: attach a prefix to; "prefixed words" [ant: suffix] |
prefix
(foldoc) | prefix
atto-
exa-
femto-
giga-
kilo-
mega-
micro-
milli-
peta-
pico-
tera-
yocto-
yotta-
zepto
zetta-
1. An SI prefix used to multiply the value of an {SI
(Système International)} unit by some power of ten.
2. In mathematics or programming, a
prefix operator is one that is written before its operand. In
a programming language using prefix notation, all operators
are prefix operators.
(2014-07-08)
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| | podobné slovo | definícia |
prefix notation
(encz) | prefix notation, n: |
prefixation
(encz) | prefixation, n: |
prefixed
(encz) | prefixed,s předponou Zdeněk Brož |
prefixes
(encz) | prefixes,předpony n: pl. Zdeněk Brož |
prefixing
(encz) | prefixing,prefixování n: Zdeněk Brož |
prefixování
(czen) | prefixování,prefixingn: Zdeněk Brož |
Prefix
(gcide) | Prefix \Pre*fix"\, v. t. [imp. & p. p. Prefixed; p. pr. & vb.
n. Prefixing.] [L. praefixus, p. p. of praefigere to fix or
fasten before; prae before + figere to fix: cf. F. pr['e]fix
fixed beforehand, determined, pr['e]fixer to prefix. See
Fix.]
[1913 Webster]
1. To put or fix before, or at the beginning of, another
thing; as, to prefix a syllable to a word, or a condition
to an agreement.
[1913 Webster]
2. To set or appoint beforehand; to settle or establish
antecedently. [Obs.] " Prefixed bounds. " --Locke.
[1913 Webster]
And now he hath to her prefixt a day. --Spenser.
[1913 Webster]Prefix \Pre"fix\, n. [Cf. F. pr['e]fixe.]
That which is prefixed; esp., one or more letters or
syllables combined or united with the beginning of a word to
modify its signification; as, pre- in prefix, con- in
conjure.
[1913 Webster] |
Prefixed
(gcide) | Prefix \Pre*fix"\, v. t. [imp. & p. p. Prefixed; p. pr. & vb.
n. Prefixing.] [L. praefixus, p. p. of praefigere to fix or
fasten before; prae before + figere to fix: cf. F. pr['e]fix
fixed beforehand, determined, pr['e]fixer to prefix. See
Fix.]
[1913 Webster]
1. To put or fix before, or at the beginning of, another
thing; as, to prefix a syllable to a word, or a condition
to an agreement.
[1913 Webster]
2. To set or appoint beforehand; to settle or establish
antecedently. [Obs.] " Prefixed bounds. " --Locke.
[1913 Webster]
And now he hath to her prefixt a day. --Spenser.
[1913 Webster] |
Prefixing
(gcide) | Prefix \Pre*fix"\, v. t. [imp. & p. p. Prefixed; p. pr. & vb.
n. Prefixing.] [L. praefixus, p. p. of praefigere to fix or
fasten before; prae before + figere to fix: cf. F. pr['e]fix
fixed beforehand, determined, pr['e]fixer to prefix. See
Fix.]
[1913 Webster]
1. To put or fix before, or at the beginning of, another
thing; as, to prefix a syllable to a word, or a condition
to an agreement.
[1913 Webster]
2. To set or appoint beforehand; to settle or establish
antecedently. [Obs.] " Prefixed bounds. " --Locke.
[1913 Webster]
And now he hath to her prefixt a day. --Spenser.
[1913 Webster] |
Prefixion
(gcide) | Prefixion \Pre*fix"ion\, n. [Cf. OF. prefixion.]
The act of prefixing. [R.] --Bailey.
[1913 Webster] |
prefix notation
(wn) | prefix notation
n 1: a parenthesis-free notation for forming mathematical
expressions in which each operator precedes its operands
[syn: prefix notation, Lukasiewicz notation, {Polish
notation}] |
prefixation
(wn) | prefixation
n 1: formation of a word by means of a prefix |
binary prefix
(foldoc) | binary prefix
(Or "IEC prefix") A prefix used with a unit of data to
mean multiplication by a power of 1024. Binary prefixes are most
often used with "byte" (e.g. "kilobyte") but also with bit
(e.g. "megabit").
For example, the term kilobyte has historically been used to
mean 1024 bytes, and megabyte to mean 1,048,576 bytes. The
multipliers 1024 and 1,048,576 are powers of 1024, which is itself
a power of two (1024 = 2^10). It is this factor of two that gives
the name "binary prefix".
This is in contrast to a decimal prefix denoting a power of
1000, which is itself a power of ten (1000 = 10^3). Decimal
prefixes are used in science and engineering and are specified in
widely adopted SI standards. Note that the actual prefix - kilo
or mega - is the same, it is the interpretation that differs.
The difference between the two interpretations increases with each
multiplication, so while 1000 and 1024 differ by only 2.4%, 1000^6
and 1024^6 differ by 15%.
The 1024-based interpretation of prefixes is often still used
informally and especially when discussing the storage capacity of
random-access memory. This has lead to storage device
manufacturers being accused of false marketing for using the
decimal interpretation where customers might assume the larger,
historical, binary interpretation.
In an attempt to clarify the distinction, in 1998 the IEC
specified that kilobyte, megabyte, etc. should only be used for
powers of 1000 (following SI). They specified new prefixes for
powers of 1024 containing "bi" for "binary": kibibyte,
mebibyte, etc.; an idea originally propsed by IUPAC. IEC also
specified new abbreviations Ki, Mi, etc. for the new prefixes.
Many other standards bodies such as NIST, IEEE and BIPM
support this proposal but as of 2013 its use is rare in
non-technical circles.
Specific units of IEC 60027-2 A.2 and ISO/IEC 80000
IEC prefix Representations Customary prefix
Name Symbol Base 2 Base Base 10 Name Symbol
1024 (approx)
kibi Ki 2^10 1024^1 1.02x10^3 kilo k, K
mebi Mi 2^20 1024^2 1.05x10^6 mega M
gibi Gi 2^30 1024^3 1.07x10^9 giga G
tebi Ti 2^40 1024^4 1.10x10^12 tera T
pebi Pi 2^50 1024^5 1.13x10^15 peta P
exbi Ei 2^60 1024^6 1.15x10^18 exa E
zebi Zi 2^70 1024^7 1.18x10^21 zetta Z
yobi Yi 2^80 1024^8 1.21x10^24 yotta Y
(2013-11-04)
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prefix notation
(foldoc) | prefix notation
prefix syntax
(Or "prefix syntax") One of the possible orderings
of functions and operands: in prefix notation the function
precedes all its operands. For example, what may normally be
written as "1+2" becomes "(+ 1 2)". A few languages (e.g.,
lisp) have strictly prefix syntax, many more employ prefix
notation in combination with infix notation.
The opposite, postfix notation, is somewhat rarer.
(2014-07-08)
|
prefix syntax
(foldoc) | prefix notation
prefix syntax
(Or "prefix syntax") One of the possible orderings
of functions and operands: in prefix notation the function
precedes all its operands. For example, what may normally be
written as "1+2" becomes "(+ 1 2)". A few languages (e.g.,
lisp) have strictly prefix syntax, many more employ prefix
notation in combination with infix notation.
The opposite, postfix notation, is somewhat rarer.
(2014-07-08)
|
si prefix
(foldoc) | SI prefix
The standard metric prefixes used in the
Système International d'Unités (SI) conventions for
scientific measurement.
Here are the SI magnifying prefixes, along with the
corresponding binary interpretations in common use:
prefix abr decimal binary
yocto- 1000^-8
zepto- 1000^-7
atto- 1000^-6
femto- f 1000^-5
pico- p 1000^-4
nano- n 1000^-3
micro- * 1000^-2 * Abbreviation: Greek mu
milli- m 1000^-1
kilo- k 1000^1 1024^1 = 2^10 = 1,024
mega- M 1000^2 1024^2 = 2^20 = 1,048,576
giga- G 1000^3 1024^3 = 2^30 = 1,073,741,824
tera- T 1000^4 1024^4 = 2^40 = 1,099,511,627,776
peta- 1000^5 1024^5 = 2^50 = 1,125,899,906,842,624
exa- 1000^6 1024^6 = 2^60 = 1,152,921,504,606,846,976
zetta- 1000^7 1024^7 = 2^70 = 1,180,591,620,717,411,303,424
yotta- 1000^8 1024^8 = 2^80 = 1,208,925,819,614,629,174,706,176
"Femto" and "atto" derive not from Greek but from Danish.
The abbreviated forms of these prefixes are common in
electronics and physics.
When used with bytes of storage, these prefixes usually denote
multiplication by powers of 1024 = 2^10 (K, M, G and T are
common in computing). Thus "MB" stands for megabytes (2^20
bytes). This common practice goes against the edicts of the
BIPM who deprecate the use of these prefixes for powers of
two. The formal SI prefix for 1000 is lower case "k"; some,
including this dictionary, use this strictly, reserving upper
case "K" for multiplication by 1024 (KB is thus "kilobytes").
Also, in data transfer rates the prefixes stand for powers of
ten so, for example, 28.8 kb/s means 28,800 bits per second.
The unit is often dropped so one may talk of "a 40K salary"
(40000 dollars) or "2 meg of disk space" (2*2^20 bytes).
The accepted pronunciation of the initial G of "giga-" is
hard, /gi'ga/.
Confusing 1000 and 1024 (or other powers of 2 and 10 close in
magnitude) - for example, describing a memory in units of 500K
or 524K instead of 512K - is a sure sign of the marketroid.
For example, 3.5" microfloppies are often described as
storing "1.44 MB". In fact, this is completely specious. The
correct size is 1440 KB = 1440 * 1024 = 1474560 bytes. Alas,
this point is probably lost on the world forever.
In 1993, hacker Morgan Burke proposed, to general approval on
Usenet, the following additional prefixes: groucho (10^-30),
harpo (10^-27), harpi (10^27), grouchi (10^30). This would
leave the prefixes zeppo-, gummo-, and chico- available for
future expansion. Sadly, there is little immediate prospect
that Mr. Burke's eminently sensible proposal will be ratified.
(2009-09-01)
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