Relating to the inner or internal part of a sphenoid bone (a bone in the skull).
From Greek 'entos' (inside) and 'sphenoid' (wedge-shaped), from 'sphen' (wedge) and 'eidos' (form). This anatomical adjective describes the interior aspects of this important skull bone.
Your skull has a bone called the sphenoid that looks like a tiny wedge holding everything together—'entosphenal' refers to its hidden inner surfaces that your brain actually touches.
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