TRAIN n.
llow them into the field. Campbell (Dict. Mil. Sci.). -- Train of mechanism, a series of moving pieces, as wheels and pinions, each of which is follower to that which drives it, and driver to that which follows it. -- Train road, a slight railway for small cars, -- used for construction, or in mining. -- Train tackl…
TRANSIENT a.
Passing before the sight or perception, or, as it were, moving over or across a space or scene viewed, and then disappearing; hence, of short duration; not permanent; not lasting or durable; not stationary; passing; fleeting; brief; transitory; as, transient pleasure. "Measured this transient world." Milton.…
TROCHOID n.
ycloid; 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, cardioids, etc., are all trochoids.
UNDULATORY a.
Moving in the manner of undulations, or waves; resembling the motion of waves, which successively rise or swell rise or swell and fall; pertaining to a propagated alternating motion, similar to that of waves. Undulatory theory, or Wave theory (of light) (Opt.), that theory which regards its various phenomena as due to…