- -id [id, əd]suffix1. [< L -is, pl. -ides < Gr -is, pl. -idēs, patronymic suffix] a thing belonging to or connected with; specif.,a) Astron. a meteor that seems to radiate from a (specified) constellation [Leonid]b) Biol. a particle or body [energid]c) Med. an allergic reaction of the skin to (specified) bacteria, fungi, etc. in the bodyan allergic reaction of the skin to (specified) bacteria, fungi, etc. in the body2. [< ModL -idae: see -IDAE] an animal or plant belonging to a (specified) group [ephemerid]3. Chem. -IDE
English World dictionary. V. Neufeldt. 2014.