Definition of cryptopentamerous in US English:

cryptopentamerous

adjective

Entomology
rare
  • (Of an insect) having tarsi that seem to have four joints but actually have five, with one of the joints minute or concealed; (of a tarsus) having this form.

Origin

Mid 19th century; earliest use found in William Shuckard (?1803–1868), entomologist. After post-classical Latin cryptopentamera, plural.

Pronunciation

cryptopentamerous

/ˌkrɪptə(ʊ)pɛnˈtam(ə)rəs/