| slovo | definícia |
cnida
(gcide) | Lasso \Lass"o\ (l[a^]s"s[-o]) n.; pl. Lassos (-s[=o]z). [Sp.
lazo, L. laqueus. See Lace.]
A rope or long thong of leather with a running noose, used
for catching horses, cattle, etc.
[1913 Webster]
Lasso cell (Zool.), one of a peculiar kind of defensive and
offensive stinging cells, found in great numbers in all
c[oe]lenterates, and in a few animals of other groups.
They are most highly developed in the tentacles of
jellyfishes, hydroids, and Actini[ae]. Each of these cells
is filled with, fluid, and contains a long, slender, often
barbed, hollow thread coiled up within it. When the cell
contracts the thread is quickly ejected, being at the same
time turned inside out. The thread is able to penetrate
the flesh of various small, soft-bodied animals, and
carries a subtle poison by which they are speedily
paralyzed and killed. The threads, at the same time, hold
the prey in position, attached to the tentacles. Some of
the jellyfishes, as the Portuguese man-of-war, and
Cyanea, are able to penetrate the human skin, and
inflict painful stings in the same way. Called also
nettling cell, cnida, cnidocell.
[1913 Webster] |
Cnida
(gcide) | Cnida \Cni"da\ (n[imac]"d[.a]), n.; pl. Cnid[ae]
(n[imac]"d[=e]). [NL., fr. Gr. kni`dh nettle, sea nettle.]
(Zool.)
One of the peculiar stinging cells found in C[oe]lenterata; a
nematocyst; a lasso cell.
[1913 Webster] |
| | podobné slovo | definícia |
cnidarian
(encz) | cnidarian,žahavec n: Zdeněk Brož |
phylum cnidaria
(encz) | phylum Cnidaria, n: |
Acnida cannabina
(gcide) | Hemp \Hemp\ (h[e^]mp), n. [OE. hemp, AS. henep, h[ae]nep; akin
to D. hennep, OHG. hanaf, G. hanf, Icel. hampr, Dan. hamp,
Sw. hampa, L. cannabis, cannabum, Gr. ka`nnabis, ka`nnabos;
cf. Russ. konoplia, Skr. [,c]a[.n]a; all prob. borrowed from
some other language at an early time. Cf. Cannabine,
Canvas.]
1. (Bot.) A plant of the genus Cannabis ({Cannabis
sativa}), the fibrous skin or bark of which is used for
making cloth and cordage. The name is also applied to
various other plants yielding fiber.
[1913 Webster]
2. The fiber of the skin or rind of the plant, prepared for
spinning. The name has also been extended to various
fibers resembling the true hemp.
[1913 Webster]
African hemp, Bowstring hemp. See under African, and
Bowstring.
Bastard hemp, the Asiatic herb Datisca cannabina.
Canada hemp, a species of dogbane (Apocynum cannabinum),
the fiber of which was used by the Indians.
Hemp agrimony, a coarse, composite herb of Europe
(Eupatorium cannabinum), much like the American boneset.
Hemp nettle, a plant of the genus Galeopsis ({Galeopsis
Tetrahit}), belonging to the Mint family.
Indian hemp. See under Indian, a.
Manila hemp, the fiber of Musa textilis.
Sisal hemp, the fiber of Agave sisalana, of Mexico and
Yucatan.
Sunn hemp, a fiber obtained from a leguminous plant
(Crotalaria juncea).
Water hemp, an annual American weed (Acnida cannabina),
related to the amaranth.
[1913 Webster] |
cnida
(gcide) | Lasso \Lass"o\ (l[a^]s"s[-o]) n.; pl. Lassos (-s[=o]z). [Sp.
lazo, L. laqueus. See Lace.]
A rope or long thong of leather with a running noose, used
for catching horses, cattle, etc.
[1913 Webster]
Lasso cell (Zool.), one of a peculiar kind of defensive and
offensive stinging cells, found in great numbers in all
c[oe]lenterates, and in a few animals of other groups.
They are most highly developed in the tentacles of
jellyfishes, hydroids, and Actini[ae]. Each of these cells
is filled with, fluid, and contains a long, slender, often
barbed, hollow thread coiled up within it. When the cell
contracts the thread is quickly ejected, being at the same
time turned inside out. The thread is able to penetrate
the flesh of various small, soft-bodied animals, and
carries a subtle poison by which they are speedily
paralyzed and killed. The threads, at the same time, hold
the prey in position, attached to the tentacles. Some of
the jellyfishes, as the Portuguese man-of-war, and
Cyanea, are able to penetrate the human skin, and
inflict painful stings in the same way. Called also
nettling cell, cnida, cnidocell.
[1913 Webster]Cnida \Cni"da\ (n[imac]"d[.a]), n.; pl. Cnid[ae]
(n[imac]"d[=e]). [NL., fr. Gr. kni`dh nettle, sea nettle.]
(Zool.)
One of the peculiar stinging cells found in C[oe]lenterata; a
nematocyst; a lasso cell.
[1913 Webster] |
Cnidae
(gcide) | Cnida \Cni"da\ (n[imac]"d[.a]), n.; pl. Cnid[ae]
(n[imac]"d[=e]). [NL., fr. Gr. kni`dh nettle, sea nettle.]
(Zool.)
One of the peculiar stinging cells found in C[oe]lenterata; a
nematocyst; a lasso cell.
[1913 Webster] |
Cnidaria
(gcide) | Cnidaria \Cni*da"ri*a\ (n[i^]*d[=a]"r[i^]*[.a]), n. pl. [NL. See
Cnida.] (Zool.)
A comprehensive group equivalent to the true C[oe]lenterata,
i. e., exclusive of the sponges. They are so named from
presence of stinging cells (cnidae) in the tissues. See
Coelenterata.
[1913 Webster] |
cnidaria
(wn) | Cnidaria
n 1: hydras; polyps; jellyfishes; sea anemones; corals [syn:
Cnidaria, phylum Cnidaria, Coelenterata, {phylum
Coelenterata}] |
cnidarian
(wn) | cnidarian
n 1: radially symmetrical animals having saclike bodies with
only one opening and tentacles with stinging structures;
they occur in polyp and medusa forms [syn: coelenterate,
cnidarian] |
family hemiprocnidae
(wn) | family Hemiprocnidae
n 1: tree swifts [syn: Hemiprocnidae, family Hemiprocnidae] |
family tridacnidae
(wn) | family Tridacnidae
n 1: large marine hard-shell clams [syn: Tridacnidae, {family
Tridacnidae}] |
hemiprocnidae
(wn) | Hemiprocnidae
n 1: tree swifts [syn: Hemiprocnidae, family Hemiprocnidae] |
phylum cnidaria
(wn) | phylum Cnidaria
n 1: hydras; polyps; jellyfishes; sea anemones; corals [syn:
Cnidaria, phylum Cnidaria, Coelenterata, {phylum
Coelenterata}] |
tridacnidae
(wn) | Tridacnidae
n 1: large marine hard-shell clams [syn: Tridacnidae, {family
Tridacnidae}] |
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