Hypertext Webster Gateway: "monotreme"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Monotreme \Mon"o*treme\, n. [Cf. F. monotr[`e]me.] (Zo["o]l.)
One of the Monotremata.
From WordNet (r) 1.7 (wn)
monotreme
n : the most primitive mammals comprising the only extant
members of the subclass Prototheria [syn: {egg-laying
mammal}]
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