1. [Contr. from orfrays, or from arras.] A sort of gold or silver lace. Johnson.
2. A peculiar pattern in which gold lace or silver lace is worked; especially, one in which the edges are
ornamented with conical figures placed at equal distances, with spots between them.
(Orse"dew Or"se*due) n. Leaf metal of bronze; Dutch metal. See under Dutch.
(||Or`seille") n. [F.] See Archil.
(Or*sel"lic) a. [From F. orseille archil. See Archil.] (Chem.) Pertaining to, or designating, an
acid found in certain lichens, and called also lecanoric acid. [Formerly written also orseillic.]
(Or`sel*lin"ic) a. (Chem.) Pertaining to, or designating, an organic acid obtained by a partial
decomposition of orsellic acid as a white crystalline substance, and related to protocatechuic acid.
(Ort) n.; pl. Orts [Akin to LG. ort, ortels, remnants of food, refuse, OFries. ort, OD. oorete,
ooraete; prob. from the same prefix as in E. ordeal + a word akin to eat.] A morsel left at a meal; a
fragment; refuse; commonly used in the plural. Milton.
Let him have time a beggar's orts to crave.Shak.
(Or`ta*lid"i*an) n. (Zoöl.) Any one of numerous small two-winged flies of the family Ortalidæ.
The larvæ of many of these flies live in fruit; those of others produce galls on various plants.
(Or"thid) n. (Zoöl.) A brachiopod shell of the genus Orthis, and allied genera, of the family Orthidæ.
(||Or"this) n. [NL., fr. Gr. 'orqo`s straight.] (Zoöl.) An extinct genus of Brachiopoda, abundant in
the Paleozoic rocks.
(Or"thite) n. (Min.) A variety of allanite occurring in slender prismatic crystals.
(Or"tho-) [Gr. straight; akin to Skr. rdhva upright, vrdh to grow, to cause to grow.]
1. A combining form signifying straight, right, upright, correct, regular; as, orthodromy, orthodiagonal,
2. (Chem.) A combining form (also used adjectively), designating: (a) (Inorganic Chem.) The one of
several acids of the same element (as the phosphoric acids), which actually occurs with the greatest
number of hydroxyl groups; as, orthophosphoric acid. Cf. Normal. (b) (Organic Chem.) Connection
with, or affinity to, one variety of isomerism, characteristic of the benzene compounds; contrasted
with meta- or para-; as, the ortho position; hence, designating any substance showing such isomerism; as,
an ortho compound.