Trimestrial is valid Scrabble Word

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

11 letters word
13 points in Scrabble
15 points in WWF

Definitions for TRIMESTRIAL in dictionary:

NOUN:

each of the three terms in an academic year.
a period of three months, especially as a division of the duration of pregnancy.

ADJECTIVE:

relating to a trimester, a period of three months, also TRIMESTRAL
Of or pertaining to a trimester, or period of three months; occurring once in every three months; quarterly.
relating to a trimester

Similar words containing MESTRI without suffix al and without prefix tri

bimestrial14 semestrial12 bimestrially19

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