Iso-

//aɪsə-// prefix

prefix ·Uncommon ·Advanced level

Definitions

Prefix
  1. 1
    Same, identical. morpheme

    "iso- + effect → isoeffect"

  2. 2
    Equal; equivalent. morpheme

    "iso- + rhythm → isorhythm"

  3. 3
    Isomer. morpheme

    "iso- + methadone → isomethadone"

  4. 4
    Of an aliphatic compound, especially a fatty acid, having a branch on the penultimate carbon atom of a chain. morpheme

    "iso- + hexane → isohexane"

  5. 5
    Forms terms for specific kinds of isolines. morpheme

    "iso- + -therm → isotherm"

Show 1 more definition
  1. 6
    Isomorphism. morpheme

Synonyms

All synonyms
equihomoipsiparisyn-//sym

Example

More examples

"iso- + methadone → isomethadone"

Etymology

Internationalism. Learned borrowing from Ancient Greek ἴσος (ísos, “equal”).

Related phrases

isohilbert spaceisoinner product

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.