baseline

On the 17th a baseline was laid down on the plateau, and Blake was able to commence his survey of the island.

Meanwhile his baseline had been extended twenty miles to the westto near Noyon.

The crescent rests on a baseline formed by the slowly-proceeding line of women, children, and baggage-horses.

With two tracers, separated on a baseline of a few million kilometers, we can plot position closely.

Anyway, he knocked it straight down the third baseline and fooled the Journals rivals, for their fielders were not on duty.