variation chart (varias hon chart)

A chart on which lines, called isogonic lines, are drawn pa ing through places having the same magnetic variation. See cut under isogonic. variation-compa (vā-ri-a's hon-kum"pas), n. A declination-compa . variator (vā'ri-a-tor), n. A joint used in underground electrical mains to allow for the expansion or contraction of the metal with changes of temperature. varicated (var'i-ka-ted), a. [ The initial fever of chicken-pox. (b) Modified smallpox; varioloid. (Rare and erroneous.]