(zoology) Any of a group of jawless fishes named for the cephalaspids, a group of osteostracans.

(grammar) Indicating position behind something.

A light oil ground from corn, used for cooking as well as for fuel.

(US, equestrianism) To bite the bit, especially when restless; to champ. / (US, chiefly Midland American English and Western American English) To complain; to rant; to rave.