Forbidden transition
noun
1.
(physics) an electronic transition in an atom, molecule, etc, that is not permitted by electric dipole selection rules
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[fer-bid-ing, fawr-] /fərˈbɪd ɪŋ, fɔr-/ adjective 1. grim; unfriendly; hostile; sinister: his forbidding countenance. 2. dangerous; threatening: forbidding clouds; forbidding cliffs. [fer-bid, fawr-] /fərˈbɪd, fɔr-/ verb (used with object), forbade or forbad or forbid, forbidden or forbid, forbidding. 1. to command (a person) not to do something, have something, etc., or not to enter some […]
- Forbore
[fawr-bawr, -bohr] /fɔrˈbɔr, -ˈboʊr/ verb 1. simple past tense of 1 . [fawr-bair] /fɔrˈbɛər/ verb (used with object), forbore, forborne, forbearing. 1. to refrain or abstain from; desist from. 2. to keep back; withhold. 3. Obsolete. to endure. verb (used without object), forbore, forborne, forbearing. 4. to refrain; hold back. 5. to be patient or […]
- Forborn
[fawr-bair] /fɔrˈbɛər/ verb (used with object), forbore, forborne, forbearing. 1. to refrain or abstain from; desist from. 2. to keep back; withhold. 3. Obsolete. to endure. verb (used without object), forbore, forborne, forbearing. 4. to refrain; hold back. 5. to be patient or self-controlled when subject to annoyance or provocation. /fɔːˈbɛə/ verb -bears, -bearing, -bore, […]
- Forborne
[fawr-bawrn, -bohrn] /fɔrˈbɔrn, -ˈboʊrn/ verb 1. past participle of 1 . [fawr-bair] /fɔrˈbɛər/ verb (used with object), forbore, forborne, forbearing. 1. to refrain or abstain from; desist from. 2. to keep back; withhold. 3. Obsolete. to endure. verb (used without object), forbore, forborne, forbearing. 4. to refrain; hold back. 5. to be patient or self-controlled […]
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[fawr-boo sh] /ˈfɔr bʊʃ/ noun, Astronomy. 1. the sudden decrease in the intensity of cosmic rays after an increase in solar activity.