ROYAL a.
olor, verging toward blue. -- Royal tern (Zoöl.), a large, crested American tern (Sterna maxima). -- Royal tiger. (Zoöl.) See Tiger. -- Royal touch, the touching of a diseased person by the hand of a king, with the view of restoring to health; -- formerly extensively practiced, particularly for the scrofula, or king…
SPECTRUM n.
chemical effects, as in photography. These, in the usual photogrophic methods, have their maximum influence at and beyond the violet rays, but are not limited to this region. -- Chromatic spectrum, the visible colored rays of the solar spectrum, exhibiting the seven principal colors in their order, and covering the ce…
TIDE n.
e under Work, v. t. -- Tide day, the interval between the occurrences of two consecutive maxima of the resultant wave at the same place. Its length varies as the components of sun and moon waves approach to, or recede from, one another. A retardation from this cause is called the lagging of the tide, while the acceler…