Phrase guide

red tide

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

An algal bloom of sufficient quantity to cause discoloration (often red) in a body of water; red tides can potentially cause irritation or death to exposed creatures.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

An algal bloom of sufficient quantity to cause discoloration (often red) in a body of water; red tides can potentially cause irritation or death to exposed creatures.

specifically, one caused by Karenia brevis.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxin

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: seawater, saltwater, brine

History

Etymology

From red + tide.

Across languages

Translations

14 source translations are retained for this English entry.

  • Chinese Mandarin: 赤潮 (chìcháo) — algal bloom
  • Chinese Mandarin: 紅潮 /红潮 (hóngcháo) — algal bloom
  • Finnish: punainen vuorovesi — algal bloom
  • French: marée rouge — algal bloom
  • Galician: marea vermella — algal bloom
  • German: rote Flut — algal bloom
  • Greek: κόκκινη παλίρροια (kókkini palírroia) — algal bloom
  • Hungarian: vörös dagály — algal bloom
  • Japanese: 赤潮 (akashio) — algal bloom
  • Portuguese: maré vermelha — algal bloom
  • Russian: кра́сный прили́в (krásnyj prilív) — algal bloom
  • Spanish: marea roja — algal bloom
  • Thai: ช่วงน้ําแดง (chûangnáam daeng) — algal bloom
  • Vietnamese: thuỷ triều đỏ — algal bloom