Sign, Sig´num, n. Any character or other arbitrary abbreviation of a word or term.
Prominent among those used in ornithology are: ♂, male; ♀, female; ⚪, juv. young, juvenis; ad., adult; hornot., hornotine; pull., pullus, chick; sen. or sr., senior, senex, old; pt., plumage; nupt. temp., in the breeding season; æst., summer; hyem., winter; vern., spring; aut., autumnal; mus., museum; coll., collection, cabinet; syn., synonym; =, equal to; >, more than; <, less than; +, plus; ×, in a different sense; v., vide, see; cf., confer, consult; i.e. or h.e., that is; l. c., loco citato, in the place just cited; op. cit., the work cited; h. l., hoc loco, here; auct., auctt., author, authors; script., writer; p., page; vol. or t., volume, tome; pl. or tb., plate, tabula; f., or fig., figure; infra, below (reference); supra, above; qu., query; ?, query; !, certainty, from autopsy; err., error; corr., corrigenda; add., addenda; descr., description; id., the same (person); ib. or ibid., there (in the same place); quid? what (may it be)? sc., scilicet, to wit; viz., videlicet, namely; excl., exclusive of; n., nova, novum, new; var., variety; sp., species; gen., genus; fam., family; ord., order; n. sp., n. g., new species, genus. Authors’ names are constantly abbreviated, with the first one, two, or three, or other most characteristic letters.
Sincip´ital, a. Pertaining to the sinciput.
Sin´ciput, n. Anterior half of pileus, from bill to vertex. (32.)
Sinis´trad, a. Toward the left.
Sinistral, a. On the left side.
Si´nus, n. Name of numerous and various cavities of the body.
Skel´eton, n. Sum of the bones of a body. It generally means only the endoskeleton proper, or internal bony framework of the body, as distinguished from exoskeleton or dermoskeleton.
Sole, n. (106.)
Soles of Toes, n. (118.)