Bilabiate

a. [f. BI- pref.² 1 + LABIATE, f. L. labi-a lip + -ATE¹.] Two-lipped.

1794.  Martyn, Rousseau’s Bot., xxxi. 479. The nectaries are bilabiate.

1839.  Todd, Cycl. Anat. & Phys., II. 113/2.