Scull

1. (v.) In sport or recreational rowing, especially on inland water, to propel a boat by oars, where each of one or several persons uses two oars, one on each side of the boat. This contrasts with the maritime traditional working boat or naval usage, where this activity is called rowing.
2. (v.) To propel a boat with a single oar resting in a notch at the stern, using a figure of eight motion of the blade of the oar, which is continuously immersed in the water
3. (n.) An oar used for sculling
4. (n.) A boat propelled by sculling, generally for recreation or racing