• Webster's Revised Unabridged Dictionary
    • a Unciform ŭn"sĭ*fôrm Having the shape of a hook; being of a curved or hooked form; hooklike.
    • n Unciform (Anat) The unciform bone. See Illust. of Perissodactyla.
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Century Dictionary and Cyclopedia
    • unciform Uncinate in form; hooked or crooked; hook-like: specifically applied in anatomy to certain hook-like processes of bone: as, the unciform process of the ethmoid; the unciform process of the unciform bone.
    • n unciform In anatomy and zoology, one of the bones of the wrist, so called from its hook-like process; a carpal bone of the distal row, the innermost one on the ulnar or little-finger side, in special relation with the heads of the fourth and fifth metacarpals, supposed to represent carpalia IV and V of the typical carpus. See carpus, and cuts under Artiodactyla, Perissodactyla, hand, pisiform, and scapholunar.
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Chambers's Twentieth Century Dictionary
    • adj Unciform un′si-form hook-shaped
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Webster's Revised Unabridged Dictionary
L. uncus, a hook + -form,
Chambers's Twentieth Century Dictionary
L. uncus, a hook.


In literature:

U was the Unciform bone of the wrist.
"Punch, or the London Charivari, Volume 1, Complete" by Various
U, The unciform bone.
"A Treatise on Anatomy, Physiology, and Hygiene (Revised Edition)" by Calvin Cutter
The final bone of that series, the unciform, seems to represent two bones fused.
"The Cambridge Natural History, Vol X., Mammalia" by Frank Evers Beddard