A bony projection or outgrowth within or upon a bone, particularly in vertebral anatomy and skeletal development.
From Greek 'enta-' (within, inside) combined with 'apophysis' (a projection from a bone). This specialized term emerged in 19th-century anatomical and medical literature.
Your skeleton is covered with tiny named bumps and projections—some are 'apophyses' (away from), some are 'epiphyses' (upon), and this 'entapophysis' is within—anatomists literally mapped your bones with Greek prefix combinations.
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