ineducabilia

from The Century Dictionary.

• The lower one of two main series of monodelphian or placental mammals, consisting of the orders Chiroptera, Insectivora, Glires or Rodentia, and Bruta or Edentata, whose cerebrum is comparatively small, leaving much of the olfactory lobes and of the cerebellum exposed, and whose corpus callosum is oblique, ends before the vertical of the hippocampal sulcus, and has no well-defined rostrum.