Real Dictionary

arabesque
countable noun: An arabesque is a position in ballet dancing. The dancer stands on one leg with their other leg lifted and stretched out backwards, and their arms stretched out in front of them.
countable noun: In art, an arabesque is a design of flowing lines.

arabesque in American English
a complex and elaborate decorative design of intertwined lines suggesting flowers, foliage, animals, geometric patterns, etc., used in drawing, painting, low relief, metalwork, etc.
of, done in, or like arabesque; fantastic and elaborate
adjective: decorated with or characterized by arabesques
noun: a sinuous, spiraling, undulating, or serpentine line or linear motif

arabesque in British English
adjective: designating, of, or decorated in this style
noun: a classical position in which the dancer has one leg raised behind and both arms stretched out in one of several conventional poses