Something that acts like a tentacle in its ability to grasp and hold.

Roget 781: retention; retaining etc. v.; keep, detention, custody; tenacity, firm hold, grasp, gripe, grip, iron grip.    fangs, teeth, claws, talons, nail, unguis, hook, tentacle, tenaculum; bond etc. (vinculum) 45.    clutches, tongs, forceps, pincers, nippers, pliers, vice.    paw, hand, finger, wrist, fist, neaf^†, neif^†.    bird in hand; captive etc. 754.    ... show more

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.

Dutch: tentakel
Polish: macka