Rheotaxis is valid Scrabble Word

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

9 letters word
19 points in Scrabble
18 points in WWF

Definitions for RHEOTAXIS in dictionary:

NOUN:

the movement of an organism in response to a current of water
movement of an organism towards or away from a current of water

OTHER DEFINITIONS:

a taxis in which mechanical stimulation by a stream of fluid (as water) is the directive factor

Words related to RHEOTAXIS

rheotactic17 rheotaxes19

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