TROCHOID n.
The curve described by any point in a wheel rolling on a line; a cycloid; a roulette; in general, the curve described by any point fixedly connected with a moving curve while the moving curve rolls without slipping on a second fixed curve, the curves all being in one plane. Cycloids, epicycloids, hypocycloids, cardioid…
TUMBLEWEED n.
bitually breaks away from its roots in the autumn, and is driven by the wind, as a light, rolling mass, over the fields and prairies; as witch grass, wild indigo, Amarantus albus, etc.
TURN v.
ge on, as around a metal sheet or boiler plate, by stretching, bending, and hammering, or rolling the metal. -- To turn against. (a) To direct against; as, to turn one's arguments against himself. (b) To make unfavorable or hostile to; as, to turn one's friends against him. -- To turn a hostile army, To turn the enem…
VINE n.
-- Vine-leaf rooer (Zoöl.), a small moth (Desmia maculalis) whose larva makes a nest by rolling up the leaves of the grapevine. The moth is brownish black, spotted with white. -- Vine louse (Zoöl.), the phylloxera. -- Vine mildew (Bot.), a fungous growth which forms a white, delicate, cottony layer upon the leaves,…
VOLVOX n.
minute, pale-green, globular, organisms, about one fiftieth of an inch in diameter, found rolling through water, the motion being produced by minute colorless cilia. It has been considered as belonging to the flagellate Infusoria, but is now referred to the vegetable kingdom, and each globule is considered a colony of…