[theer-ee-uh n]
  1. (in some classification systems) belonging or pertaining to the group Theria, comprising the marsupial and placental mammals and their extinct ancestors.
  1. a therian animal.

Origin of therian

< New Latin Theri(a) name of the group (< Greek thēría, plural of thēríon wild beast) + -an Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for therian

Historical Examples of therian