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Related to olfactory pit: nasal pit, Olfactory placode, nasal placode

PIT, fossa. A hole dug in the earth, which was filled with water, and in which women thieves were drowned, instead of being hung. The punishment of the pit was formerly common in Scotland.

References in periodicals archive ?
Subsequently, a depression develops in the surrounding mesenchyme on each side of the two nasal placodes, thereby forming two olfactory pits or gutters.
Who would have thought that such a delightful treasure trove of a book could have resulted from plumbing the depths of understanding of the olfactory pits inside the nose--once thought to be vestigial organs?