Crossword Genius

Trident-shaped letters (4)

Ross

I believe the answer is:

psis

'trident-shaped letters' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for psis that I've seen before include "letters from abroad" , "letters from Greece" .)

I've seen this clue in the Newsday, the LA Times and The Wall Street Journal.
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