the skull.-a shoal of fish.-a boat; a cockboat. see sculler.-one of a pair of short oars worked by one person.-a single oar used at the stern in propelling a boat.-the common skua gull.-to impel (a boat) with a pair of sculls, or with a single scull or oar worked over the stern obliquely from side to side.-to impel a boat with a scull or sculls.