ROCK n.
ata, etc. -- Rock crystal (Min.), limpid quartz. See Quartz, and under Crystal. -- Rock dove (Zoöl.), the rock pigeon; -- called also rock doo. -- Rock drill, an implement for drilling holes in rock; esp., a machine impelled by steam or compressed air, for drilling holes for blasting, etc. -- Rock duck (Zoöl.), the…
SWALLOW-TAILED a.
United by dovetailing; dovetailed. Swallow-tailed duck (Zoöl.), the old squaw. -- Swallow-tailed gull (Zoöl.), an Arctic gull (Xema furcata), which has a deeply forked tail. -- Swallow-tailed hawk or kite (Zoöl.), the fork-tailed kite. -- Swallow-tailed moth (Zoöl.), a European moth (Urapteryx sambucaria) having tai…