The Collaborative International Dictionary of English v.0.48:

Labiate \La"bi*ate\, v. t.
   To labialize. --Brewer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Labiate \La"bi*ate\, a. [NL. labiatus, fr. L. labium lip.]
   (Bot.)
   (a) Having the limb of a tubular corolla or calyx divided
       into two unequal parts, one projecting over the other
       like the lips of a mouth, as in the snapdragon, sage, and
       catnip.
   (b) Belonging to a natural order of plants (Labiat[ae]), of
       which the mint, sage, and catnip are examples. They are
       mostly aromatic herbs.
       [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Labiate \La"bi*ate\, n. (Bot.)
   A plant of the order Labiat[ae].
   [1913 Webster]

WordNet (r) 3.0 (2006):

labiate
    adj 1: having lips or parts that resemble lips [syn: labiate,
           liplike]