Source : Webster's Revised Unabridged Dictionary (1913)

Ootooid \O*["o]t"*ooid\, Ootocoid \O*["o]t"o*coid\, n. [Gr. ?
   laying eggs (? egg + ? a bearing, ? to bear) + -oid.]
   (Zo["o]l.)
   A half oviparous, or an oviparous, mammal; a marsupial or
   monotreme.