From nl. tentāculum, from tentō.

• IPA: /ˈtɛntəkəl/, /ˈtɛntɪkəl/

tentacle (plural tentacles)

1. (zoology) An elongated, boneless, flexible organ or limb of some animals, such as the octopus and squid.
   • 1873, Jules Verne, “The “Devil Fish.”—Terrible Encounter.—Crushed to Death in the Arms of a Monster.—Ned Land saved by the Captain.—“Only Revenge”.”, in [anonymous], transl., Twenty Thousand Leagues under the Seas; […], James R. Osgood edition, Boston, Mass.: Geo[rge] M[urray] Smith & Co., →OCLC ↗, part II, page 274 ↗:

     With one blow of the axe, Captain Nemo cut this formidable tentacle, that slid wriggling down the ladder.

   • 1897, H. G. Wells, The Crystal Egg

     The body was small, but fitted with two bunches of prehensile organs, like long tentacles, immediately under the mouth.

   • 1936, H. P. Lovecraft, The Shadow Out of Time

     Surmounting this head were four slender grey stalks bearing flower-like appendages, whilst from its nether side dangled eight greenish antennae or tentacles.

2. (botany) One of the glandular hairs on the leaves of certain insectivorous plants.
3. (figurative) An insidious reach or influence.

   the tentacles of the criminal underworld

4. (figurative) Something like a zoological limb.
5. (UK, military, historical) An officer employed to drive out to troops and transmit back requests for support via a special radio link.
   • 2013, Dr Ian Gooderson, Air Power at the Battlefront, page 26:

     A joint RAF/Army staffed Air Support Control (ASC) headquarters was established at each army corps and each armoured division, linked to the forward brigades by a 'tentacle' equipped with two-way wireless telegraphy.

• tentaculum

• French: tentacule
• German: Tentakel
• Italian: tentacolo
• Portuguese: tentáculo
• Russian: щу́пальце
• Spanish: tentáculo

• French: tentacule

• French: tentacule, pieuvre

tentacle (tentacles, present participle tentacling; simple past and past participle tentacled)

1. to move like a tentacle