pseudolabium
/ˌs(j)uːdəʊˈleɪbɪəm/Zoology
noun
A mouthpart in various invertebrates; specifically: †(a) a gnathochilarium of a millipede (obsolete ); (b) each of a pair of lobes or flaps formed on either side of the mouth by projections of the lining of the buccal cavity in nematodes of the order Spirurida.
Origin
Late 19th century; earliest use found in Alpheus Packard (1839–1905). From pseudo- + labium.