pronephros

A sea that meets the head of a vessel or rolls against her course.

The head of water employed to turn a millwheel.

(informal) With the whole person; deeply; completely.

(idiomatic) A calm, focused demeanor and mindset; a person having such characteristics.

A person who has a temporary circular body modification to the forehead, created by saline injection.

(literally) A gunshot wound to the head. / (colloquial, in similes) Something very undesirable or unwanted.

(obsolete) Poll tax. / (obsolete) A reward paid per person captured at sea etc. / (obsolete) A reward for a proscribed outlaw's head.

(rail transport) The top part of a railway rail; the part of the rail the wheel runs on.

(phytopathology) a blight afflicting the seed heads or inflorescences of cereal crops