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Wiktionary
trikonasana

n. (context asana English) A pose in which the legs are kept straight and wide apart, in the shape of a triangle, while the upper body bends.

Wikipedia
Trikonasana

Trikonasana (; ; IAST: trikoṇāsana) or Triangle Pose is an asana. Variations include utthita trikonasana (extended triangle pose), baddha trikonasana (bound triangle pose) and parivrtta trikonasana (revolved triangle pose).