Below the hyoid bone; denoting especially a group of muscles: the sternohyoideus, sternothyroideus, thyrohyoideus, and omohyoideus. SYN: subhyoid, subhyoidean.
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in·fra·hy·oid .in-frə-'hī-.ȯid adj situated below the hyoid bone <the fascia of the \infrahyoid region>
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in·fra·hy·oid (in″frə-hiґoid) subhyoid.Medical dictionary. 2011.