触腕

Etymology
Seemingly a Japanese coinage from -derived. Appears during the mid- to late-1800s, in either the or.

Noun

 * 1)  a tentacle: specifically, either of the two tentacles of a squid or cuttlefish that are longer than the other eight (technically called “arms”)
 * 2) * 1977, 竹村 よしお and 佐藤 魚水, 海の釣り魚, ISBN 9784586504145