isotonic

adjective

iso·​ton·​ic ˌī-sə-ˈtä-nik 

1

: 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

: isosmotic

—used of solutions

isotonically

ˌī-sə-ˈtä-ni-k(ə-)lē 

adverb

isotonicity

ˌī-sə-tō-ˈni-sə-tē 

noun

Examples of isotonic in a Sentence

Recent Examples on the Web

Sets were littered with ice coolers and sachets of isotonic powder. — Charlie Campbell, TIME, 24 Jan. 2025

Cleansing with paint thinner and isotonic saline solution was necessary. — Discover Magazine, 19 Nov. 2019

Word History

Etymology

International Scientific Vocabulary

First Known Use

1891, in the meaning defined at sense 1

Rhymes for isotonic

• anharmonic
• anionic
• avionic
• catatonic
• cationic
• chorionic
• cosmogonic
• diachronic
• diatonic
• electronic
• embryonic
• excitonic

Medical Definition

isotonic

adjective

iso·​ton·​ic ˌī-sə-ˈtän-ik 

1

: of, relating to, or exhibiting equal osmotic pressure

isotonic solutions

compare hypertonic sense 2, hypotonic sense 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 sense 2

isotonically

-i-k(ə-)lē 

adverb

isotonicity

-tō-ˈnis-ət-ē 

noun

plural isotonicities