Pinnipeds

Part of speech: noun

Definitions

1. A group of marine mammals that includes seals, sea lions, and walruses, characterized by their fin-like limbs adapted for swimming
2. These aquatic or semi-aquatic mammals are recognized for their streamlined bodies and blubber, which help them in cold waters
3. A classification of carnivorous marine mammals known for their adaptations to a life in water, sharing traits like whiskers and a social structure

Etymology: "Pinnipeds" is the plural of "pinniped," and the name is a plain Latin compound meaning "fin-foot." The first half comes from "pinna," the Latin word for a feather, wing, or fin, and the second from "pes," meaning foot. Together they describe the animals' flippers, which are essentially limbs modified into paddles for life in the water. The word belongs to the scientific vocabulary of the modern era, built from classical roots rather than handed down from ancient writers. Naturalists needed a single label for seals, sea lions, and walruses, which share this flipper-based body plan, and combining two Latin words was the standard way to coin such a term. Ancient Romans knew the component words but had no concept of this grouping.

Synonyms: seals, sea lions, walruses, marine mammals, aquatic mammals