An assistant to a churchwarden, one of whose duties is to collect offerings during a service.

The band of frequencies each side of the frequency of a carrier wave; formed as a result of modulation of the carrier.

(astronomy) Time measured by the apparent diurnal motion of the vernal equinox; approximated by that based on the rotation of planet Earth relative to the seemingly fixed stars.

(uncountable, mineralogy) a widespread brown mineral, FeCO₃, having the structure of calcite / (countable) an iron meteorite / An indigo-blue variety of quartz. / (obsolete) magnetic iron ore; lodestone

The orbital period of the Earth; a measure of the time it takes for the Sun to return to the same position with respect to the stars of the celestial sphere. A sidereal year is about 20.4 minutes longer than the tropical year (which is what is kept stable by the Gregorian calendar) due to precession of the equinoxes.

plural of sidearm

Third-person singular simple present indicative form of sidearm

plural of sideboard

(chiefly Britain) Sideburns.

Third-person singular simple present indicative form of sideboard