prostemmate Zool.
(prəʊˈstɛmət)
[f. pro-2 2 + Gr. στέµµα, -µατ- a wreath: see stemma.]
An organ of unknown function situated in front of the eyes in some apterous insects of the lowest type of the order Collembola. Hence prosteˈmmatic a., pertaining to or of the nature of a prostemmate.
| 1895 Cambr. Nat. Hist. V. 193 Some of the Collembola possess a very curious structure called the prostemmatic or ante-ocular organ... The prostemmate is placed slightly in front of the group of ocelli. |