noun

• An appendage used for sensing on the head of an insect, crab, or other animal. [from Template:SAFESUBST: c.]
• An apparatus to receive or transmit electromagnetic waves and convert respectively to or from an electrical signal.
• (figurative) The faculty of intuitive astuteness.
• (biochemistry) A fragment of an oligosaccharide
• (nautical) The spar to which a lateen sail is attached, which is then hoisted up the mast.