A Grammatical Dictionary of Botanical Latin

-trix,-icis (s.f.III), abl.sg. –trice, nom.&acc.pl. –trices: 1. a female Latin substantival suffix referring to an agent, i.e. to one that does a (specified) activity, based on a verb (often of the First Conjugation) and applied to the passive past participle, as in deliberatrix,-icis (s.f.III), abl.sg. deliberatrice, she who deliberates [> L. delibero, 1., past participle deliberatus,-a,-um; delibera- + -trix > deliberatrix];

Cf. L. doceo,-cui,-ctus 2, to teach, instruct > doctus > doct- + -or,-is (s.m.III), doctor,-oris (s.m.III), he who teaches; doctrix,-icis (s.f.III), she who teaches.

NOTE: the male suffix is –or,-oris (s.m.III), e.g. deliberator,-oris (s.m.III); see –or,-oris (s.m.III); see agent.

NOTE: not –thrix,-trichis (s.f.III), q.v., in Gk. comp.; ‘hair.’

2. some Latin nouns:

Cicatrix,-icis (s.f.III), abl.sg.. cicatrice: a scar, the visible mark of a healed wound.

      singular      plural
Nom.  cicatrix    cicatrices
Gen.  cicatrices  cicatricum
Dat.  cicatrici   cicatricibus
Acc.  cicatricem  cicatrices
Abl.  cicatrice   cicatricibus

3. “in adjectival use, neuter plural forms, substantives (nouns) occur:

Victricia, gen.sg. victricum (pl.f.III) victory, triumph; adj. victix,-icis (adj.B), victorious, triumphant; Victrix,-icis (s.f.III), abl.sg. victrixce, a female victoress, winner (victor,-oris (s.m.III).

Ultricia, gen.sg. ultricum (pl.f.III), retribution; adj. ultrix,-icis (adj.B), avenging; “as a title of the Furies and other agents of retribution” (Glare); Ultrix,-icis (s.f.III), abl.sg. ultrice, a female avenger, punisher (masc. ultor,-oris (s.m.III)).