molécula
molecule
Origin: From French molécule, from New Latin molecula, diminutive of Latin moles (mass).
Usage Note
Molécula carries a written accent on the antepenultimate syllable (mó-le-cu-la), making it a proparoxytone. Its adjective form is molecular (estructura molecular). The word is feminine, following the -a ending pattern, and its plural is regular: moléculas. It belongs firmly to scientific vocabulary but appears in popular science writing and school curricula.
Examples
"Una molécula de agua tiene dos átomos de hidrógeno."
Natural Translation
A water molecule has two hydrogen atoms.
Literal Translation
A molecule of water has two atoms of hydrogen

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