IMPERFECT a.
, a flower wanting either stamens or pistils. Gray. -- Imperfect interval (Mus.), one a semitone less than perfect; as, an imperfect fifth. -- Imperfect number (Math.), a number either greater or less than the sum of its several divisors; in the former case, it is called also a defective number; in the latter, an abu…
ISINGLASS n.
A semitransparent, whitish, and very pure from of gelatin, chiefly prepared from the sounds or air bladders of various species of sturgeons (as the Acipenser huso) found in the of Western Russia. It used for making jellies, as a clarifier, etc. Cheaper forms of gelatin are not unfrequently so called. Called also fish g…