Definition of prostheca in English:

prostheca

noun

Entomology
  • In various insects: a flexible projection from the base of the mandible.

Origin

Early 19th century; earliest use found in William Kirby (1759–1850), entomologist and naturalist. From ancient Greek προσθήκη addition, appendage from πρός to + θήκη case, after προστιθέναι to put to, add.

Pronunciation

prostheca

/prɒsˈθiːkə/