Etymograph

English

dimensionless

Dimensionless comes from Latin dīmēnsiō ‘measuring (out)’, and goes back to Proto-Indo-European *meh₁-.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*meh₁-1‘to measure’reconstructed
  2. Proto-Italicc. 1500–700 BCE*mētis1reconstructed
  3. Latinc. 75 BCE–200 CEmētior1‘to measure or estimate’
  4. Latinc. 75 BCE–200 CEdīmētior1‘to measure (out or off)’
  5. Latinc. 75 BCE–200 CEdīmēnsiō1‘measuring (out)’
  6. English1500–presentdimension1
  7. Englishearliest quotation 1674dimensionless1

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, English dimensionless
  2. Earliest quotation in Wiktionary’s entry: 1674, John Milton, Book XI: “To Heav'n thir prayers / Flew up, nor miſsd…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*meh₁-Wiktionary, English dimensionless‘to measure’reconstructed
  2. Proto-Italicc. 1500–700 BCE*mētisWiktionary, English dimensionlessreconstructed
  3. Latinc. 75 BCE–200 CEmētiorWiktionary, English dimensionless‘to measure or estimate’
  4. Latinc. 75 BCE–200 CEdīmētiorWiktionary, English dimensionless‘to measure (out or off)’
  5. Latinc. 75 BCE–200 CEdīmēnsiōWiktionary, English dimensionless‘measuring (out)’
  6. English1500–presentdimensionWiktionary, English dimensionless
  7. Englishearliest quotation 1674dimensionlessWiktionary, English dimensionless. Earliest quotation in Wiktionary’s entry: 1674, John Milton, Book XI: “To Heav'n thir prayers / Flew up, nor miſsd…”

A compound of dimension + -less

Proto-Indo-European *meh₁- ‘to measure’

Proto-Italic *mētis

Latin mētior ‘to measure or estimate’

Latin dīmētior ‘to measure (out or off)’

Latin dīmēnsiō ‘measuring (out)’

English dimension

Linked words

through Proto-Indo-European *meh₁- ‘to measure’

month, moon, moral, meal, sunny, meter, metric, moody, metre, meta, menstrual, asymmetry, madder, metrology, mete, metis, metra, firman, moodiness, menses, 64 more

through Proto-Italic *mētis

commensal, 20 more

through Latin mētior ‘to measure or estimate’

measure, immense, mesa, commensurate, mensa, 21 more

Today it means

adj Lacking dimensions.

Sources

Sources: Wiktionary, “dimensionless”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *meh₁- / dimensionless

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