from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A covalent bond in which three electron pairs are shared between two atoms.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A covalent bond in which three electron pairs (instead of the usual one) are shared between two atoms; most common between carbon atoms and carbon or nitrogen atoms, but a few other forms are known. Symbolized in formulae as ≡.
from the GNU version of the Collaborative International Dictionary of English
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