Dictionary
seek•er
Pronunciation: (sē'kur), [key]—
n.
1. a person or thing that seeks.
2. Rocketry.
a. a device in a missile that locates a target by sensing some characteristic of the target, as heat emission.
b. a missile equipped with such a device.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.