rod (
http://definr.com/rod)
n 1: (British) a linear measure of 16.5 feet [syn:
perch,
pole]
2: a long thin implement made of metal or wood
3: any rod-shaped bacterium
4: a square rod of land [syn:
perch,
pole]
5: visual receptor cell sensitive to dim light [syn:
rod cell,
retinal rod]
6: (slang) a gangster's pistol [syn:
gat]