Sentence:  Furthermore the <WSD>armhooks</WSD> of the Belemnoidea show a micro-texture and a mode of growth similar to the horny inner rings of the suckers of the Decabrachia. 
Meaning of the word marked with <WSD> tags:  A hook-like projection on the arm of a cephalopod, such as on the armhook squid (Gonatus fabricii).