Radioallergosorbent is valid word

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

Definitions for RADIOALLERGOSORBENT in dictionary:

Find what other words can be done using letters: "radioallergosorbent"
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