Standard Lemma guide

retarder

noun · 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

noun

Meaning 1

Something which retards or slows.

Definition source: English Wiktionary via Wiktextract

Examples

  • The substance acted as a retarder to the chemical reaction because it radically changed the pH.

Meaning relationships

Synonyms: bottleneck, inhibitor, retardant, limiter

Antonyms: accelerant, promoter, quickener

2

noun

Meaning 2

A device for slowing down large trucks, lorries, buses, shunted railway wagons.

Definition source: English Wiktionary via Wiktextract

Topics: engineering, mechanical, mechanical-engineering, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A refrigerator used to slow down proofing of yeast when making dough.

Definition source: English Wiktionary via Wiktextract

Topics: baking, cooking, food, lifestyle

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From retard + -er.