furca

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furca

any fork-like structure, such as that formed by the last two abdominal segments in some arthropods or which supports the two spongy pads on the proboscis of some insects.

furca,

n 1. the bone that separates the distal and mesial roots of molars.
n 2. the area where a tooth root divides.
furcal concavity
(fur´kəl konkav´itē),
n a depression present in the furcation area of the root of a tooth.