The segment of a myofibril between two adjacent Z lines, representing the functional unit of striated muscle. [sarco- + G. meros, part]
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sar·co·mere 'sär-kə-.mi(ə)r n any of the repeating structural units of striated muscle fibrils
sar·co·mer·ic .sär-kə-'mer-ik adj
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n.
one of the basic contractile units of which striated muscle fibres are composed.
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sar·co·mere (sahrґko-mēr) [sarco- + -mere] the contractile unit of myofibrils; sarcomeres are repeating units, delimited by the Z bands along the length of the myofibril. See Plate 32.Medical dictionary. 2011.