Standard Lemma guide

eohippus

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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  • /ˈiːəʊˌhɪpəs/
  • CMU ARPABET: IY2 OW0 HH IH1 P AH0 S Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

An extinct early Eocene mammal (Hyracotherium leporinum), ancestral to the modern horse.

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

earliest horse; extinct primitive dog-sized four-toed Eocene animal

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: dawn horse

Antonyms: none provided

Broader terms: horse, Equus caballus

History

Etymology

Originally a genus name, Eohippus, formed in New Latin, from Ancient Greek ἠώς (ēṓs, “dawn”) + ἵππος (híppos, “horse”). By surface analysis, eo- + Latin hippus.