Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Zoology An elongated flexible unsegmented extension, as one of those surrounding the mouth or oral cavity of the squid, used for feeling, grasping, or locomotion.
  • n. Botany One of the sensitive hairs on the leaves of insectivorous plants, such as the sundew.
  • n. A similar part or extension, especially with respect to the ability to grasp or stretch: an espionage network with far-reaching tentacles.

from Wiktionary, Creative Commons Attribution/Share-Alike License

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

from the GNU version of the Collaborative International Dictionary of English

  • n. A more or less elongated process or organ, simple or branched, proceeding from the head or cephalic region of invertebrate animals, being either an organ of sense, prehension, or motion.

from The Century Dictionary and Cyclopedia

  • n. In zoology, some or any elongated and comparatively slender or flexible process or appendage of an animal, used as an organ of touch, or for exploration, prehension, and sometimes locomotion; a feeler; a tentaculum.
  • n. In botany, a kind of sensitive hair or filament, such as the glandular hairs of Drosera.
  • n. Figuratively, anything resembling a tentacle; a feeler.
  • n. See the adjectives.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. something that acts like a tentacle in its ability to grasp and hold
  • n. any of various elongated tactile or prehensile flexible organs that occur on the head or near the mouth in many animals; used for feeling or grasping or locomotion

Etymologies

New Latin tentāculum, from Latin tentāre, to feel, try; see tentative.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From New Latin tentaculum, from tentō. (Wiktionary)

Examples

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