adj \ˌī-sə-ˈme-trik\

Definition of ISOMETRIC

: of, relating to, or characterized by equality of measure; especially : relating to or being a crystallographic system characterized by three equal axes at right angles
: of, relating to, involving, or being muscular contraction (as in isometrics) against resistance, without significant change of length of muscle fibers, and with marked increase in muscle tone—compare isotonic 2
iso·met·ri·cal·ly \-tri-k(ə-)lē\ adverb

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