a. and sb. Anat. [ad. mod.L. cricoīdēs, a. Gr. κρικοειδής ring-shaped, f. κρίκο-ς = κίρκος ring + -ειδής -form. Formerly used in L. form.]

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  A.  adj. Ring-shaped; applied spec. to the ring-shaped cartilage that forms the lower and back part of the larynx.

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[1727–51.  Chambers, s.v., The cartilage cricoides.]

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1746.  R. James, Introd. Moufet’s Health’s Improv., 5. The broad posterior Surface of the Cricoide Cartilage.

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1861.  F. H. Ramadge, Curab. Consumpt., 36. Between the first ring of the trachea and the cricoid cartilage.

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  B.  sb. The cricoid cartilage.

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[1706.  Phillips (ed. Kersey), Cricoides, the Gristle of the Larynx, or top of the Wind-pipe, shaped like a Ring.

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1727–51.  Chambers, s.v. Crico-arytænoidæus, In the posterior and lower part of the cricoides.]

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1842.  E. Wilson, Anat. Vade M., 492. The Cricoid is a ring of cartilage, narrow in front and broad behind.

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1872.  Huxley, Physiol., vii. 178–9. A great ring of cartilage, the cricoid..., which forms, as it were, the top of the windpipe.

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  Cricoidean, a. = CRICOID. (Syd. Soc. Lex.)

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