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quasimolecule
quasimolecule n. 
/ˌkwɑːzɪˈmɒlᵻkjuːl/, /ˌkwɒzɪˈmɒlᵻkjuːl/, /ˌkwɑziˈmɑləˌkjul/, /ˌkweɪˌsaɪˈmɑləˌkjul/, /ˌkwɑsiˈmɑləˌkjul/ [after German Quasimolekel (M. Born & J. Franck 1925, in Zeitschr. f. Physik 31 423; now usually Quasimolekül)]
Brit. /ˌkweɪzʌɪˈmɒlᵻkjuːl/
, /ˌkweɪzʌɪˈmɒlᵻkjuːl//ˌkwɑːzɪˈmɒlᵻkjuːl//ˌkwɒzɪˈmɒlᵻkjuːl/U.S. /ˌkweɪˌzaɪˈmɑləˌkjul/
, /ˌkweɪˌzaɪˈmɑləˌkjul//ˌkwɑziˈmɑləˌkjul//ˌkweɪˌsaɪˈmɑləˌkjul//ˌkwɑsiˈmɑləˌkjul/ΚΠ
1927 Proc. Royal Soc. 1926–7 A. 113 723 Born and Franck..postulate the existence of quasi-molecules conditioned by the triple collision of a light quantum and two colliding bodies.
1968 C. G. Kuper Introd. Theory Superconductivity xi. 181 A pair of electrons in the immediate vicinity of the Fermi surface can form a bound quasimolecule.
1988 New Scientist 31 Mar. 41/2 They showed that an excited ‘quasimolecule’ of two carbon nuclei orbiting each other formed briefly during the collision.
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