sulcatio

sulcatio [CL sulcare+-tio], ploughing; b (transf., w. ref. to movement of ship through water). sulco ‥ unde sulcator, sulcatus, ~o Osb. Glouc. Deriv. 525; 1459 pro ~one et aratura factis in dicta grangia per bondpluys ExchScot 579; hec ~o, A. a balkyng WW. b naves ‥ ~oni marium multum apte Ps.-Elmh. Hen. V 31.