scaphium

from The Century Dictionary.

• noun In botany, the carina or keel of papilionaceous flowers.
• noun In entomology, the unpaired appendage lying between the uncus and the intromittent organ of lepidopterous insects; the upper organ, or tegumen of White, consisting in the swallowtail butterflies of chitinous points on a membranous body.
• noun [capitalized] A genus of coleopterous insects of the family Scaphidiidæ, with two species, one of Europe, the other of the United States.
• noun In Greek pottery, a vase of boat-like form.