All these words are from Prostho Plus by Piers Anthony. They are mostly dental terms, of which he uses a lot.
Gingival: of or pertaining to the gums
Buccal: of or pertaining to the cheek
Occlusals: pertaining to the masticating surfaces of the premolar and molar teeth
Malocclusals: a misalignment of teeth and/or incorrect relation between the teeth of the two dental arches
Sprue: an opening through which molten metal is poured into a mold
Perspicacious: having keen mental perception and understanding; discerning
Distal: situated away from the point of origin or attachment, as of a limb or bone; terminal