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Permanent white
(gcide) | Permanent \Per"ma*nent\, a. [L. permanens, -entis, p. pr. of
permanere to stay or remain to the end, to last; per + manere
to remain: cf. F. permanent. See Per-, and Mansion.]
Continuing in the same state, or without any change that
destroys form or character; remaining unaltered or unremoved;
abiding; durable; fixed; stable; lasting; as, a permanent
impression.
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Eternity stands permanent and fixed. --Dryden.
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Permanent gases (Chem. & Physics), hydrogen, oxygen,
nitrogen, and carbon monoxide; -- also called
incondensible gases or incoercible gases, before their
liquefaction in 1877. The term is now archaic.
Permanent way, the roadbed and superstructure of a finished
railway; -- so called in distinction from the contractor's
temporary way.
Permanent white (Chem.), barium sulphate (heavy spar),
used as a white pigment or paint, in distinction from
white lead, which tarnishes and darkens from the
formation of the sulphide.
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Syn: Lasting; durable; constant. See Lasting.
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