/ded"uy'/ , n. , pl. deadeyes .
1. Naut. either of a pair of disks of hardwood having holes through which a lanyard is rove: used to tighten shrouds and stays.
2. an expert marksman.
[ 1740-50; DEAD + EYE; as nautical term, prob. ellipsis from deadman's eye, ME dedmaneseye deadeye ]