Stĕm'mȧ-tȧ, n. pl.

Stĕm'mȧ-tȧ, n. pl. [Gr. στεμμα, pl. στέμματα, a garland or chaplet.] (Entom.) Three smooth, hemispherical dots, generally seen on the top of the head, chiefly in the hymenoptera;—called also ocelli. Baird.

☞ The term is also applied to the simple and minute eyes of worms, and generally, throughout the lower animals, to those simple eyes which compose the large, compound eyes. Baird.