- exocone
- \\ˈeksəˌkōn\ adjective
Etymology: exo- + cone: having the crystalline cone replaced by an ingrowth of transparent cuticular material from the cornea — used chiefly of insect eyes
Useful english dictionary. 2012.
exocone
Look at other dictionaries:
exocone — exo·cone … English syllables
acone eye — (ARTHROPODA: Insecta) A condition (possibly primitive) of a compound eye in which the ommatidium is lacking a crystalline cone, but is modified in the form of elongated transparent bodies called Semper cells; see pseudocone, eucone, exocone … Dictionary of invertebrate zoology
crystalline cone — (ARTHROPODA: Insecta) The hard, clear intracellular structure of the eucone eye, produced by Semper cells beneath the cornea and bordered laterally by the primary pigment cells; also known as vitreous body or crystalline body; see acone eye,… … Dictionary of invertebrate zoology
crystalline tract — (ARTHROPODA: Insecta) 1. In beetles with exocone eyes, a strand formed by the Semper cells across the clear zone to the rhabdon. 2. In skipper butterflies and some ditrysian moths (Bombycoidea), a strand formed by the retinula cells … Dictionary of invertebrate zoology
