SIG´MOID, _a._ S-shaped. Several parts are so called.
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.