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quasimolecular
quasimolecular adj. 
/ˌkwɑːzɪməˈlɛkjᵿlə/, /ˌkwɒzɪməˈlɛkjᵿlə/, /ˌkwɑziməˈlɛkjələr/, /ˌkweɪˌsaɪməˈlɛkjələr/, /ˌkwɑsiməˈlɛkjələr/ Physics and Chemistry (a) analogous to or resembling something molecular; (b) designating an ion consisting of a molecule to which a proton has been attached in order to facilitate spectroscopic analysis.
Brit. /ˌkweɪzʌɪməˈlɛkjᵿlə/
, /ˌkweɪzʌɪməˈlɛkjᵿlə//ˌkwɑːzɪməˈlɛkjᵿlə//ˌkwɒzɪməˈlɛkjᵿlə/U.S. /ˌkweɪˌzaɪməˈlɛkjələr/
, /ˌkweɪˌzaɪməˈlɛkjələr//ˌkwɑziməˈlɛkjələr//ˌkweɪˌsaɪməˈlɛkjələr//ˌkwɑsiməˈlɛkjələr/ΚΠ
1906 C. Barus Nucleation of Uncontaminated Atmosphere i. 1 The pressure difference was so adjusted as to entrap all X-ray nuclei, to the exclusion of the normal, quasi-molecular nuclei of dust-free air.
1936 W. L. Davies Chem. Milk xii. 246 Adhesion of the globules on colliding during their quasi-molecular movements.
1974 Physics Bull. Oct. 467/1 Fernandez..gave a review of the radiative and other properties of resonant states observed in heavy ion collisions. Usually known as quasimolecular states, these resonances represent states at approximately 30 MeV excitation.
1995 Jrnl. Biotechnol. 41 155 Matrix-assisted laser desorption ionization..is a rather recent ‘soft ionization’ technique which produces quasimolecular ions of large organic molecules of up to several 100 kDa molecular mass.
2006 Steroids 71 846/2 The molecular formula, C28H45NO4, was assigned on the basis of the quasimolecular ion [M + H]+ at m/z 460.3422.
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