Antenna :: Antenna (n.) A movable, articulated organ of sensation, attached to the heads of insects and Crustacea. There are two in the former, and usually four in the latter. They are used as organs of touch, and in some species of Crustacea the cavity of the ear is situated near the basal joint. In insects, they are popularly called horns, and also feelers. The term in also applied to similar organs on the heads of other arthropods and of annelids..

Antennae :: Antennae (pl. ) of Antenn.

Antennal :: Antennal (a.) Belonging to the antennae.

Septennate :: Septennate (n.) A period of seven years; as, the septennate during which the President of the French Republic holds office..

Tennantite :: Tennantite (n.) A blackish lead-gray mineral, closely related to tetrahedrite. It is essentially a sulphide of arsenic and copper..

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