TYPHOID a.
hoid fever, a disease formerly confounded with typhus, but essentially different from the latter. It is characterized by fever, lasting usually three or more weeks, diarrhæa with evacuations resembling pea soup in appearance, and prostration and muscular debility, gradually increasing and often becoming profound at the…
UNDERSTANDING n.
All these are attributed to the understanding, or perceptive power, though it be the two latter only that use allows us to say we understand. Locke. In its wider acceptation, understanding is the entire power of perceiving an conceiving, exclusive of the sensibility: the power of dealing with the impressions of sense,…
UNDULATORY a.
and frequency, the sensation of brightness depending on the former, that of color on the latter. The undulations are supposed to take place, not in the direction of propagation, as in the air waves constituting sound, but transversely, and the various phenomena of refraction, polarization, interference, etc., are attr…
VENETIAN a.
ade of thin slats, either fixed at a certain angle in the shutter, or movable, and in the latter case so disposed as to overlap each other when close, and to show a series of open spaces for the admission of air and light when in other positions. -- Venetian carpet, an inexpensive carpet, used for passages and stairs,…
VIS n.
t strictly synonymous. The former implies the resistance itself which is given, while the latter implies merely the property by which it is given. -- Vis mortua Etym: [L.] (Mech.), dead force; force doing no active work, but only producing pressure. -- Vis vitæ, or Vis vitalis Etym: [L.] (Physiol.), vital force. --…