Vestigial

Vestigial

Relating to a body part that has evolved so that it no longer has a practical use. Snakes have vestigial legs.

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Part of Speech: adjective
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Industry/Domain: Anatomy
Category: Gross anatomy
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vestigial

Archaeology; Evolution

Any structures that have been greatly reduced in size and function over evolutionary time to the extent that they now appear to have little or no current function.

vestigial

Anatomy; Gross anatomy

Relating to a body part that has evolved so that it no longer has a practical use. Snakes have vestigial legs.

vestigial

Plants; Botany

Reduced from the ancestral condition and no longer functional. Cf. Obsolete, rudimentary.

vestigial

Anthropology; Physical anthropology

Referring to body parts that are remnants of parts that were more fully developed and functional in an earlier stage of evolution in the species.

vestigial

Animals; Reptiles

Remaining in a species only in a much reduced or useless state. Vestigial body parts or organs are evidence of parts that the ancestors of an animal had, but that the modern ...

vestigial

Animals; Insects

Poorly developed, degenerate or atrophied, more fully functional in an earlier stage of development of the individual or species.

compound eye

Anatomy; Gross anatomy

An eye that is made up of thousands of tiny parts that act like lenses. Each of these parts is sensitive to light and forms part of an image.

fang

Anatomy; Gross anatomy

A long sharp tooth or similar body part that some animals have for seizing prey. Snakes and spiders have fangs.

endoskeleton

Anatomy; Gross anatomy

A skeleton in an animal that is located inside the body and is made of bones in humans and vertebrates.

epidermis

Anatomy; Gross anatomy

The outer layer of the skin of an animal and it helps protect against sun's rays and keeps out germs.

exoskeleton

Anatomy; Gross anatomy

A hard covering on the body of an animal, such as an insect. Exoskeletons provide support and protection for soft body parts.

spinneret

Anatomy; Gross anatomy

One of the small openings in the back part of the spider and some insect larvae. They release a sticky fluid that dries into silk.

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