Prototherian is valid Scrabble Word

Is prototherian a scrabble word?
Official Scrabble Players Dictionary NO
Official Tournament and Club Word List NO
Collins Scrabble Words YES
Is prototherian valid Words with Friends?
Words with Friends YES

12 letters word
17 points in Scrabble
18 points in WWF

Definitions for PROTOTHERIAN in dictionary:

NOUN:

a member of the Prototheria
a mammal of the group Prototheria, which comprises the monotremes and their extinct relatives.
relating to or denoting prototherians.
primitive oviparous mammals found only in Australia and Tasmania and New Guinea

ADJECTIVE:

pertaining to a member of Prototheria, which comprises the order Monotremata and related fossil forms

Words related to PROTOTHERIAN

prototherians18

Words that contain PROTOTHERIAN

prototherians18

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