Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

sphen(o)-

Wedge-shaped.

[Greek sphēn, wedge.]

The sphenoid bone (frequently abbreviated to sphenoid) forms the base of the cranium behind the eyes; spheno- is used in medicine to refer to this bone together with another part of the skull: sphenopalatine, the sphenoid plus the palate; sphenoethmoid, the sphenoid plus the ethmoid, a square bone at the root of the nose.

Outside medicine, sphenoid is a general adjective to describe something wedge-shaped; the Sphenopsida is a class of plants including the horsetails (Greek opsis, appearance); sphene is a mineral that occurs in wedge-shaped crystals; a sphenogram is a rather rare term for a wedge-shaped cuneiform character.

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