ZYGOMORPHIC

PRONUNCIATION: (zy-guh-MOR-fik)

MEANING: adjective: Having a single plane of symmetry: divisible into two mirror-image halves along only one axis.

ETYMOLOGY: From Greek zygo- (yoke) + -morphic (shaped). Earliest documented use: 1875. The term contrasts with actinomorphic structures (from actino- meaning ray), which have radial symmetry.
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ZYMOMORPHIC - budding, yeast-shaped

ZYGOMORPHIA - a sleep-like state induced by a product of fermentation (a drubnken stupor, for example)

ZYGOTOMORPHIC - shaped like a fertilized egg