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Ootooid
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.
Meaning of Ootooid from wikipedia