Webster's Revised Unabridged Dictionary · 1913

Lacinia

Lacinia , noun

[Latin, the lappet or flap of a garment.]

1.
(a) (Botany) One of the narrow, jagged, irregular pieces or divisions which form a sort of fringe on the borders of the petals of some flowers.
(b)
(Botany) A narrow, slender portion of the edge of a monophyllous calyx, or of any irregularly incised leaf.
2.
(Zoology) The posterior, inner process of the stipes on the maxilla of insects.

Also: Laciniae