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An instrument for studying or observing the successive phases of a periodic or varying motion by means of light which is periodically interrupted.

perceptible change in the body or its functions, which indicates disease, or the kind or phases of disease; as, the causes of disease often lie beyond our sight, but we learn their nature by the symptoms exhibited. Like the sick man, we are expiring with all sorts of good symptoms. Swift.

ion for passing transformers. When the three free ends are connected to a source of three-phase current, two-phase current may be derived from the secondary circuits. The reverse arrangement may be used to transform from two-phase. -- T"-connected, a.

stone. Ascetic theology, Natural theology. See Ascetic, Natural. -- Moral theology, that phase of theology which is concerned with moral character and conduct. -- Revealed theology, theology which is to be learned only from revelation. -- Scholastic theology, theology as taught by the scholastics, or as prosecuted a…

ons, and having a fatal issue; that species of drama which represents the sad or terrible phases of character and life. Tragedy is to say a certain storie, As olde bookes maken us memorie, Of him that stood in great prosperitee And is yfallen out of high degree Into misery and endeth wretchedly. Chaucer. All our traged…

Having or existing in three different phases of color; having three distinct color varieties; -- said of certain birds and insects.

(cf. Watt); -- said of an alternating current or component of current when it differs in phase by ninety degrees from the electromotive force which produces it, or of an electromotive force or component thereof when the current it produces differs from it in phase by 90 degrees.

stic medium, as in the transmission of sound; an assemblage of vibrating molecules in all phases of a vibration, with no phase repeated; a wave of vibration; an undulation. See Undulation.

The current through one branch of the star arrangement of a three-phase circuit.