air vessel

1. Hydraul:: A ve el in which air is condensed by pre ure, in order that when released its elasticity may be employed as a moving or regulating power. Such a ve el is used in a forcing pump to render the discharge of water continuous instead of intermittent. 2. Animal Physiol. Any ve el containing air; specially one of the tubes, or tracheæ, through which air for the purpose of respiration is conveyed into the bodies of insects. [AIR-TUBE.] 3. Veg . Physiol. The spiral ve els, one main function of which is believed to be to convey air, charged with an unwonted proportion of oxygen gas, to the interior of plants. (See Lindley's Introd. to Bot., 3rd ed., 1839, pp. 299-301.) air-wave, s. A wave of air. known." Airy: Sound (1868), p. 251. whose length of air - wave was therefore