Standard Lemma guide

pyrimethamine

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

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.

  • Received-Pronunciation: /ˌpɪ.ɹɪˈmɛθ.ə.miːn/
  • General-American: /ˌpɪɹ.ɪˈmɛθ.əˌmin/

1

noun

Meaning 1

A synthetic compound derived from pyrimidine, acting as a folic acid antagonist and used in the chemoprophylaxis or treatment of malaria and in the treatment of toxoplasmosis.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: medicine, pharmacology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree German Pyrimidinbor. English pyrim(idine) Proto-Indo-European *h2eydh-der. Proto-Hellenic *áithō Ancient Greek αἴθω (aíthō) ▲ Ancient Greek ᾱ̓ήρ (āḗr)influ.? Ancient Greek αἰθήρ (aithḗr)der. Latin aethērbor. German Äther German Ether Proto-Indo-European *swel-der.? Ancient Greek ῡ̔́λη (hū́lē)der. German -yl German Ethylbor. English ethyl English eth- English (di)amine English pyrimethamine From pyrim(idine) + eth- + (di)amine.