Standard Lemma guide

coolant

noun · 2 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • /ˈkuːlənt/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: K UW1 L AH0 N T Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

A medium, usually fluid, used to draw heat from an object.

Definition source: English Wiktionary via Wiktextract

Examples

  • Coolant is used in car engines and industrial processes, where excess heat could cause machine damage.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

a fluid agent (gas or liquid) that produces cooling; especially one used to cool a system by transferring heat away from one part to another

Definition source: Princeton WordNet 3.0

Examples

  • he added more coolant to the car's radiator
  • the atomic reactor used a gas coolant
  • lathe operators use an emulsion of oil and water as a coolant for the cutting tool

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: agent, fluid

History

Etymology

Etymology tree English cool Latin -ns Latin -āns Old French -antbor. Proto-Indo-European *-onts Proto-Germanic *-ndz Proto-West Germanic *-andī Old English -ende Middle English -ant English -ant English coolant From cool + -ant.

Across languages

Translations

37 source translations are retained for this English entry.

  • Arabic: مُبَرِّد (mubarrid) — a fluid
  • Bulgarian: охлажда́щ аге́нт (ohlaždášt agént) — a fluid
  • Chinese Mandarin: 冷卻劑 /冷却剂 (lěngquèjì) — a fluid
  • Czech: chladicí kapalina — a fluid
  • Dutch: koelmiddel — a fluid
  • Dutch: koelvloeistof — a fluid
  • Finnish: jäähdytysaine — a fluid
  • Finnish: jäähdytysneste — a fluid
  • Finnish: jäähdyte — a fluid
  • Finnish: jäähdytys- — a fluid
  • French: fluide caloporteur — a fluid
  • French: réfrigérant — a fluid
  • French: liquide de refroidissement — a fluid
  • Galician: refrixerante — a fluid
  • German: Kühlmittel — a fluid
  • German: Kühlflüssigkeit — a fluid
  • Hungarian: hűtőfolyadék — a fluid
  • Icelandic: kælivökvi — a fluid
  • Icelandic: kæliefni — a fluid
  • Italian: refrigerante — a fluid
  • Italian: antigelo — a fluid
  • Japanese: 冷却剤 (reikyakuzai) — a fluid
  • Korean: 냉각제 (naenggakje) — a fluid
  • Korean: 랭각제 (raenggakje) — a fluid
  • Lithuanian: šilumnešis — a fluid
  • Lithuanian: aušinimo skystis — a fluid
  • Norwegian Bokmål: kjølevæske — a fluid
  • Norwegian Bokmål: kjølevann — a fluid
  • Norwegian Nynorsk: kjølevæske — a fluid
  • Polish: chłodziwo — a fluid
  • Portuguese: refrigerante — a fluid
  • Russian: охлажда́ющая жи́дкость (oxlaždájuščaja žídkostʹ) — a fluid
  • Russian: теплоноси́тель (teplonosítelʹ) — a fluid
  • Slovak: chladiaca kvapalina — a fluid
  • Spanish: refrigerante — a fluid
  • Turkish: soğutucu — a fluid
  • Ukrainian: теплоносі́й (teplonosíj) — a fluid