mol ‧ e ‧ cule /ˈmɒlɪkjuːl $ ˈmɑː-/ BrE AmE noun [countable]
[ Date: 1700-1800 ; Language: French ; Origin: molécule , from Latin moles 'mass' ]
the smallest unit into which any substance can be divided without losing its own chemical nature, usually consisting of two or more atoms:
The molecules of oxygen gas contain just two atoms.
—molecular /məˈlekjələ, məˈlekjʊlə $ -ər/ adjective :
molecular structure