Definition of biordinal in English:

biordinal

adjective

Entomology
  • Entomology. Of hooks on the prolegs of caterpillars: arranged in a straight line or circle, and of two different, alternating, lengths.

Origin

Mid 19th century (in an earlier sense). From bi- + ordinal.

Pronunciation

biordinal

/bʌɪˈɔːdɪnl//bʌɪˈɔːd(ə)nl/