A line on a chart connecting equal times of occurrence of an event. In a weather analysis, a sequence plotted on a map of the frontal positions at several different observation times would constitute [..]

a line drawn on a map connecting points at which something occurs or arrives at the same timeStars of the same age may be found to fall on the same isochrone curve of the Hertzsprung–Russell diagram. [..]

A line on a map or chart joining points associated with a constant time difference from the transmitter to receiver of electromagnetic waves, such as radio waves, at all points along the line. [From Weik '89]

(n) an isogram connecting points at which something occurs or arrives at the same time

A line on a chart connecting equal times of occurrence of an event. In a weather analysis, a sequence plotted on a map of the frontal positions at several different observation times would constitute a set of isochrones.

A line connecting points having the same time or time difference relationship, as a line representing all points having the same time difference in the reception of signals from two radio stations suc [..]

A line on a chart connecting equal times of occurrence of an event. In a weather analysis, a sequence plotted on a map of the frontal positions at several different observation times would constitute a set of isochrones.

A line on a chart connecting equal times of occurrence of an event. In a weather analysis, a sequence plotted on a map of the frontal positions at several different observation times would constitute [..]