labial palpi rather bulky, short and with three joints, like the antenn.
labial lobes large, oval, contiguous with one another, at the tip of the labrum.
labial palpi four or five-segmented; asymmetrical (membranous behind), apex acute.
In Adjectives beginning with a labial or a Palatal, the aspirated form alone is used in the gen. and voc.
labial tics of this nature may be styled tics of facial mimicry.
"pertaining to the lips," 1590s, from Medieval Latin labialis "having to do with the lips," from Latin labium "lip" (see lip (n.)). The noun meaning "a labial sound" is from 1660s. Related: Labially.
labial la·bi·al (lā'bē-əl)
Relating to the lips or labia.