- Lyencephala
- Lyencephala Ly`en*ceph"a*la, n. pl. [NL., fr. Gr. ? to loose + ? the brain.] (Zo["o]l.) A group of Mammalia, including the marsupials and monotremes; -- so called because the corpus callosum is rudimentary. [1913 Webster]
The Collaborative International Dictionary of English. 2000.