Septennial
December 9, 2025
Septennial means something that happens every seven years or lasts seven years, and this glossary explains its meaning, history, use, and related time words.
Septennial means something that happens every seven years or lasts seven years, and this glossary explains its meaning, history, use, and related time words.
A sidereal second is a time unit based on Earth turning once relative to the stars, and it is slightly shorter than the normal second used in everyday life.
A shake is a very tiny unit of time that scientists use to measure super fast events inside atoms.
Sun’s mass is a special unit used by astronomers to tell how heavy stars and other space objects are compared with our Sun.
The Biblical Hebrew shekel was an old unit of weight and money, mainly made of silver, that people used in the Bible lands to measure value.
A scruple in apothecary weight is an old pharmacy unit of mass, equal to 20 grains or about 1.3 grams, once used to measure medicines.
The stone UK is a traditional unit for measuring weight, mostly used in the United Kingdom and Ireland to tell how heavy a person, animal, or object is.
Learn what the stone US unit means, how it relates to pounds and kilograms, and how to quickly convert this older body weight unit in everyday life.
Learn what the slug unit of mass is, how it compares to kilograms and pounds, and why some engineers still use it today.
Learn what a stere is, how this metric volume unit measures stacked firewood, and how to convert it to cubic meters, liters, and more.