An elongated, boneless, flexible organ or limb of some animals, such as the octopus and squid. (noun)
Examples of word tentacle
If one tentacle is chopped off, the starfish grows a new one, making it a model of resilience.
The right tentacle is recognizable (blue arrow) and so is the pneumostome, the breathing hole (green arrow).
The structure of each tentacle is based on the Fin Ray EffectÂ®.
The tip of the tentacle was a hardened ball, the size of a large fist.
These all possess an extraordinary organ situated on the neck, the well-known Y-shaped tentacle, which is entirely concealed in a state of repose, but which is capable of being suddenly thrown out by the insect when alarmed.