Standard Lemma guide

LD50

noun · 1 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

The amount of a substance required to kill half of a given population; a measure of toxicity.

Definition source: English Wiktionary via Wiktextract

Topics: medicine, sciences, toxicology

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Abbreviation of lethal dose 50%.

Across languages

Translations

9 source translations are retained for this English entry.

  • Armenian: միջին մահացու չափաքանակ (miǰin mahacʻu čʻapʻakʻanak) — Translations
  • Chinese Mandarin: 半數致死量 /半数致死量 (bànshù zhìsǐliàng) — Translations
  • French: DL50 — Translations
  • French: dose létale 50 — Translations
  • French: dose létale médiane — Translations
  • Japanese: 半数致死量 (hansū chishiryō) — Translations
  • Korean: 반수 치사량 (bansu chisaryang) — Translations
  • Persian: متوسط دوز کشنده — Translations
  • Russian: ЛД50 (LD50) — Translations