less common spelling of mole entry 5
: the base unit of amount of pure substance in the International System of Units that is defined as having exactly 6.02214076 x 1023 indivisible units (such as atoms or molecules) of that substance
First you would need to measure out one mole of salt. Remember that one mole of a compound equals its relative molecular mass in grams, so to obtain one mole of sodium chloride you would weigh out 58.5 g …—John Atkinson and Carol Hibbert
one mole of helium contains 4 grams
molecular; molecule
: a pigmented spot, mark, or small permanent protuberance on the human body
especially
: nevus
1
: any of numerous burrowing insectivores (especially family Talpidae) with tiny eyes, concealed ears, and soft fur
2
: one who works in the dark
3
: a machine for tunneling
4
: a spy (such as a double agent) who establishes a cover long before beginning espionage
broadly
: one within an organization who passes on information
: an abnormal mass in the uterus especially when containing fetal tissues
1
: a massive work formed of masonry and large stones or earth laid in the sea as a pier or breakwater
2
: the harbor formed by a mole
variants
or less commonly mol
plural moles
: the base unit of amount of pure substance in the International System of Units that is defined as having exactly 6.02214076 x 1023 indivisible units (such as atoms or molecules) of that substance
First you would need to measure out one mole of salt. Remember that one mole of a compound equals its relative molecular mass in grams, so to obtain one mole of sodium chloride you would weigh out 58.5 g …—John Atkinson and Carol Hibbert
one mole of helium contains 4 grams
: a spicy sauce made with chiles and usually chocolate and served with meat
Cite this Entry
“Mol.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mol. Accessed 2 Sep. 2026.
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