A period of time equal to thirty minutes, half an hour. / The time of thirty minutes past any particular hour.

Alternative spelling of half volley

A specific riding aid given by an equestrian to his/her horse, in which the driving aids and restraining aids are applied in quick succession, used as a warning signal or to rebalance the horse.

(music, US) An interval of which there are seven in a fifth or twelve in an octave, consisting of two tones whose frequency ratio is about 1.059 or 18/17.

Alternative spelling of half cell

(chemistry) Either of two equations that describe each half of a redox reaction

(physics, chemistry) Either of the two parts of an electrochemical cell containing an electrode and an electrolyte.

(rare, colloquial, especially with "on the") Inexpensive; not overpriced.

(physics, figuratively) Any half of a roughly spherical-like object; any dome-shaped object.

plural of half shell