Relating to or derived from the ethmoid bone; having the characteristics of the ethmoid structure.
From 'ethmo-' (Greek ethmos, sieve) with the suffix '-al' (relating to), creating a general adjective form to describe anything pertaining to the ethmoid bone.
While 'ethnal' isn't as commonly used as 'ethmoid,' it's a perfectly formed adjective that anatomists might use to describe any condition or feature of that sieve-like bone!
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