Crab
Crab (krăb) Crab
Pronunciation
- IPA: /kræb/
Etymology
The term "crab" comes from the Old English "crabb," which is related to the Dutch "krab" and the Old High German "krebiz," all meaning "crab."
Definition
A crab is a type of decapod crustacean of the infraorder Brachyura, which typically has a very short projecting "tail" (abdomen), usually hidden entirely under the thorax. They live in all the world's oceans, in fresh water, and on land.
Related Terms
- Decapod: An order of crustaceans within the class Malacostraca, including the crabs, lobsters, shrimps, prawns, and crayfish.
- Brachyura: The infraorder of crustaceans, known as crabs.
- Thorax: The middle part of an animal's body, between the head and the abdomen.
- Abdomen: The part of the body that contains the digestive organs, the belly.
- Crustacean: A large, diverse group of arthropods, including crabs, lobsters, shrimps, and barnacles.
Medical Relevance
In medical terms, "crab" is often used to refer to Pubic lice, small parasites that infest the hair and skin in the pubic area.
External links
- Medical encyclopedia article on Crab
- Wikipedia's article - Crab
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