Relating to the interior or internal structure of the heel bone (calcaneus).
From Greek 'entos' (within) plus Medieval Latin 'calcaneus' (heel bone, from Latin 'calx' meaning heel). The suffix '-eal' makes it an anatomical adjective.
Medical terminology is basically a puzzle where 'ento-' always means 'inside,' 'calcan-' always means 'heel,' and you can combine them to describe the insides of your heel bone—it's incredibly logical once you know the pattern!
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