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a.1.(Anat.) External to the ethmoid; prefrontal.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
It is limited rostrolaterally with the ectethmoid bone and ventrolaterally it contacts the rostroparasphenoid and to the palatine and ventrolaterally to the pterygoid in all the species studied.
The ectethmoid bone (Ec, Figure 5) is slender and its dorsal portion (facies nasalis) (Pj1, Figures 5-9) is short laterally and there is no contact with the lacrimal bone.
(10) Ectethmoid foramina: The ectethmoid (= orbitonasal) foramina were single, pinched, double, or in a few cases triple.