plural of pattern box

A form of expansion joint used in street mains of steam-heating systems. / (squash, racquetball) One of two sections of the court, inside which a server must have at least one foot during the service

plural of service box

Alternative form of feely box

plural of feelie box

plural of resistance box

A box containing one or more resistance coils.

plural of Boxing Week

(astronomy) A notional box bounding some region of space in which a celestial object is known to exist; its size depends on how accurately the true location is known.

plural of error box