UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌsuːpəˈsɪlɪərɪ/US:USA pronunciation: respellingUSA pronunciation: respelling(so̅o̅′pər silē er′ē)

WordReference Random House Unabridged Dictionary of American English © 2020
su•per•cil•i•ar•y  (so̅o̅′pər silē er′ē),USA pronunciation adj. [Anat., Zool.]
  1. of or pertaining to the eyebrow.
  2. Zoologyhaving a conspicuous line or marking over the eye, as certain birds.
  3. situated on the frontal bone at the level of the eyebrow.
  • supercili(um) + -ary 1725–35

Collins Concise English Dictionary © HarperCollins Publishers::
superciliary /ˌsuːpəˈsɪlɪərɪ/ adj
  1. relating to or situated over the eyebrow or a corresponding region in lower animals
Etymology: 18th Century: from New Latin superciliaris, from Latin supercilium, from super- + cilium eyelid
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