Triquetrum is valid Scrabble Word

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

Definitions for TRIQUETRUM in dictionary:

Words related to TRIQUETRUM

triquetra18
Find what other words can be done using letters: "triquetrum"
https://scrabble-word.com/finder/triquetrum
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