n.; pl. Antennæ [ L. antenna sail-yard; NL., a feeler, horn of an insect. ] 1. (Zool.) 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. [ 1913 Webster ]

2. (Electronics) A metallic device, variously shaped, designed for the purpose of either transmitting or receiving radio waves, as for radio or television broadcasting, or for transmitting communication signals. Some types are: whip antenna, antenna tower, horn antenna, dish antenna, directional antenna and rabbit ears. See transmitter, receiver. [ PJC ]

a. (Zool.) Belonging to the antennæ. Owen. [ 1913 Webster ]

a. [ Antenna + -ferous. ] (Zool.) Bearing or having antennæ. [ 1913 Webster ]

a. [ Antenna + -form. ] Shaped like antennæ. [ 1913 Webster ]

n. [ Dim. of antenna. ] (Zool.) A small antenna; -- applied to the smaller pair of antennæ or feelers of Crustacea. [ 1913 Webster ]

a. [ Pref. bi- + centennial. ] 1. Consisting of two hundred years. [ 1913 Webster ]

2. Occurring every two hundred years. [ 1913 Webster ]

n. The two hundredth year or anniversary, or its celebration. [ 1913 Webster ]

a. [ L. centum a hundred + annus year. ] 1. Relating to, or associated with, the commemoration of an event that happened a hundred years before; as, a centennial ode. [ 1913 Webster ]

2. Happening once in a hundred years; as, centennial jubilee; a centennial celebration. [ 1913 Webster ]

3. Lasting or aged a hundred years. [ 1913 Webster ]

That opened through long lines
Of sacred ilex and centennial pines. Longfellow. [ 1913 Webster ]

n. The celebration of the hundredth anniversary of any event; a centenary. [ U. S. ] [ 1913 Webster ]

adv. Once in a hundred years. [ 1913 Webster ]

. Colorado; -- a nickname alluding to the fact that it was admitted to the Union in the centennial year, 1876. [ Webster 1913 Suppl. ]

See under Tennis. [ 1913 Webster ]

n. A fescennine. [ 1913 Webster ]

a. [ L. octennium a period of eight years; octo eight + annus year. ] Happening every eighth year; also, lasting a period of eight years. Johnson. -- Oc*ten"ni*al*ly, adv. [1913 Webster]

n. Frequency. Hooker. [ 1913 Webster ]

a. Of or pertaining to half of a century, or a period of fifty years; as, a semicentennial commemoration. [ 1913 Webster ]

n. A fiftieth anniversary. [ 1913 Webster ]

n. [ F. septennat. ] A period of seven years; as, the septennate during which the President of the French Republic holds office. [ 1913 Webster ]

a. [ L. septennium a period of seven years; septem seven + annus year. See Seven, and Annual. ] 1. Lasting or continuing seven years; as, septennial parliaments. [ 1913 Webster ]

2. Happening or returning once in every seven years; as, septennial elections in England. [ 1913 Webster ]

adv. Once in seven years. [ 1913 Webster ]

n. [ Named after Smithson Tennant, an English chemist. ] (Min.) A blackish lead-gray mineral, closely related to tetrahedrite. It is essentially a sulphide of arsenic and copper. [ 1913 Webster ]

‖n. [ Cf. Tawny. ] (Her.) A tincture, rarely employed, which is considered as an orange color or bright brown. It is represented by diagonal lines from sinister to dexter, crossed by vertical lines. [ 1913 Webster ]

n. [ OE. tennes, tenies, tenyse; of uncertain origin, perhaps fr. F. tenez hold or take it, fr. tenir to hold (see Tenable). ] A play in which a ball is driven to and fro, or kept in motion by striking it with a racket or with the open hand. Shak. [ 1913 Webster ]

His easy bow, his good stories, his style of dancing and playing tennis, . . . were familiar to all London. Macaulay. [ 1913 Webster ]

Court tennis, the old game of tennis as played within walled courts of peculiar construction; -- distinguished from lawn tennis. --
Lawn tennis. See under Lawn, n. --
Tennis court, a place or court for playing the game of tennis. Shak. [ 1913 Webster ]

v. t. To drive backward and forward, as a ball in playing tennis. [ R. ] Spenser. [ 1913 Webster ]

‖n. [ Jap. tennō, fr. Chin. t'ien heaven + wang king. ] Lit., King of Heaven; -- a title of the emperor of Japan as the head of the Shinto religion. [ Webster 1913 Suppl. ]

n. (Zool.) The tapir. [ 1913 Webster ]

a. Of or pertaining to Alfred (Lord) Tennyson, the English poet (1809-92); resembling, or having some of the characteristics of, his poetry, as simplicity, pictorial quality, sensuousness, etc. [ Webster 1913 Suppl. ]