The Collaborative International Dictionary
Preocular
Preocular \Pre*oc"u*lar\, a. (Zo["o]l.) Placed just in front of the eyes, as the antenn[ae] of certain insects. -- n. One of the scales just in front of the eye of a reptile or fish.
Wiktionary
preocular
a. Just in front of the eyes. n. One of the scales just in front of the eye of a reptile or fish.