sphenoid

adjective
sphe·noid | \ˈsfē-ˌnȯid \
variants: or sphenoidal \sfi-ˈnȯi-dᵊl \

Definition of sphenoid 

(Entry 1 of 2)

1 : of, relating to, or being a winged compound bone of the base of the cranium

2 usually sphenoidal : having a wedged shape

sphenoid

noun

Definition of sphenoid (Entry 2 of 2)

: a sphenoid bone

Examples of sphenoid in a Sentence

Recent Examples on the Web: Adjective

But occasionally, infections can occur in a region called the sphenoid sinus, located behind the eyes near the optic nerve. Amanda Macmillan, Health.com, "A 13-Year-Old Died After a Sinus Infection Traveled to His Brain. How Does That Happen?," 16 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sphenoid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of sphenoid

Adjective

1732, in the meaning defined at sense 1

Noun

1828, in the meaning defined above

History and Etymology for sphenoid

Adjective

New Latin sphenoides, from Greek sphēnoeidēs wedge-shaped, from sphēn wedge

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Time Traveler for sphenoid

The first known use of sphenoid was in 1732

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More Definitions for sphenoid

sphenoid

adjective
sphe·noid | \ˈsfē-ˌnȯid \
variants: or sphenoidal \sfē-ˈnȯid-ᵊl \

Medical Definition of sphenoid 

(Entry 1 of 2)

: of, relating to, or being a compound bone of the base of the cranium of various vertebrates formed by the fusion of several bony elements with the basisphenoid and in humans consisting of a median body from whose sides extend a pair of broad curved winglike expansions in front of which is another pair of much smaller triangular lateral processes while ventrally two large deeply cleft processes extend downward — see greater wing, lesser wing

sphenoid

noun

Medical Definition of sphenoid (Entry 2 of 2)

: a sphenoid bone

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