DIPTERA n.
two functional wings and two balancers, as the house fly, mosquito, etc. They have a suctorial proboscis, often including two pairs of sharp organs (mandibles and maxillæ) with which they pierce the skin of animals. They undergo a complete metamorphosis, their larvæ (called maggots) being usually without feet.…
DISPLACEMENT n.
The process of extracting soluble substances from organic material and the like, whereby a quantity of saturated solvent is displaced, or removed, for another quantity of the solvent. Piston displacement (Mech.), the volume of the space swept through, or weight of steam, water, etc., displaced, in a given time, by the…
DOCK n.
r by hydraulic presses. -- Naval dock, a dock connected with which are naval stores, materials, and all conveniences for the construction and repair of ships. -- Sectional dock, a form of floating dock made in separate sections or caissons. -- Slip dock, a dock having a sloping floor that extends from deep water to…