What is the meaning of Tentacle?

An elongated, boneless, flexible organ or limb of some animals, such as the octopus and squid.

One of the glandular hairs on the leaves of certain insectivorous plants.

An insidious reach or influence.

Something like a zoological limb.

An officer employed to drive out to troops and transmit back requests for support via a special radio link.

to move like a tentacle

tentacle

Source: wiktionary.org