Standard Lemma guide

ar-

prefix · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

prefix

Meaning 1

Forming classification names for classes of organic compounds that contain a carbon skeleton and one or more aromatic rings.

Definition source: English Wiktionary via Wiktextract

Usage: morpheme

Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

prefix

Meaning 2

Used to form the names of inverse hyperbolic functions, and the symbols for these functions.

Definition source: English Wiktionary via Wiktextract

Usage: morpheme

Topics: mathematics, sciences, trigonometry

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: arc-, a-, -1

Antonyms: none provided

3

prefix

Meaning 3

Alternative form of ad- (“to, toward”).

Definition source: English Wiktionary via Wiktextract

Usage: alt-of, alternative, morpheme

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Extracted from the word aromatic.

Shortened from area (because the function describes the area under a hyperbola), by analogy with arc-, the corresponding prefix for the circular trigonometric functions.

Assimilated form of ad- before r. From Latin ad-.