Relating to the external portions of the ethmoid bone or structures associated with its outer surface.
From ectethmoid (ecto- 'external' + ethmoid bone) + -al suffix. An extended adjectival form emphasizing the skeletal anatomical features.
Adding -al to ectethmoid makes it doubly anatomical—it's like saying 'relating to the relating-to' the outer ethmoid, which is how medical language builds extreme precision through layered suffixes.
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