isotonic

iso·ton·ic

adj \ˌī-sə-ˈtän-ik\

Definition of ISOTONIC

1

: of, relating to, or exhibiting equal osmotic pressure <isotonic solutions>—compare hypertonic 2, hypotonic 2

2

: of, relating to, or being muscular contraction in the absence of significant resistance, with marked shortening of muscle fibers, and without great increase in muscle tone—compare isometric 2

—iso·ton·i·cal·ly \-i-k(ə-)lē\ adverb

—iso·to·nic·i·ty \-tō-ˈnis-ət-ē\ noun, plural iso·to·nic·i·ties