hippo
Word family
- hippopotamusnounB1
Synonym discussion
Sense: noun/1
Hippo and hippopotamus refer to the same animal, but they differ in tone. Hippo is the friendly, everyday word you use in conversation, on safari, or when talking to children. Hippopotamus is the full formal term for essays, nature documentaries, and scientific papers. The old name 'river horse' is a direct translation from Greek but sounds outdated and literary to modern ears — you may see it in old books but almost never in speech. Do not confuse a hippo with a rhinoceros: a rhino has tough armoured-looking skin, one or two horns on its nose, and lives both on grassland and near water, while a hippo is bigger, has a wide flat snout with no horn, and rarely strays far from rivers and lakes.
Etymology
Hippo is a shortening of hippopotamus, which came into English through Latin from the ancient Greek words 'hippos' (horse) and 'potamos' (river) — literally 'river horse.' People began using the clipped form 'hippo' in everyday English during the 1800s.
First known use
1850
1850, in the meaning defined above