A long, flexible arm-like appendage of certain sea creatures like octopuses and squid, used for grabbing and sensing.
From Latin 'tentaculum' (something for touching), derived from 'tentare' (to try, touch). The word originally meant anything used for testing or feeling.
Octopus tentacles have taste buds on their suckers—basically, they 'taste' everything they touch! Each tentacle can think somewhat independently, making octopuses the aliens of Earth.
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