Standard Lemma guide

onchocerciasis

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

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  • /ɒŋkəsɜːˈkaɪəsɪs/

1

noun

Meaning 1

A disease caused by a worm of the genus Onchocerca, especially as transmitted to humans by flies and often causing blindness; common in tropical Africa.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: medicine, pathology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: river blindness, Robles' disease

Antonyms: none provided

2

noun

Meaning 2

infestation with slender threadlike roundworms (filaria) deposited under the skin by the bite of black fleas; when the eyes are involved it can result in blindness; common in Africa and tropical America

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: river blindness

Antonyms: none provided

Broader terms: infestation

History

Etymology

From New Latin Onchocerca (a genus of parasitic worms), from Ancient Greek ὄγκος (ónkos, “barb”) + κέρκος (kérkos, “tail”) + -iasis.

Across languages

Translations

4 source translations are retained for this English entry.

  • Finnish: jokisokeus — Translations
  • Italian: oncocercosi — Translations
  • Spanish: oncocercosis — Translations
  • Swahili: upofu wa mto — Translations