pyrroline

noun
pyr·ro·line | \ ˈpirəˌlēn , -lə̇n \
plural -s

Definition of pyrroline 

: either of two bases C4H7N intermediate between pyrrolidine and pyrrole; dihydro-pyrrole especially : a fuming liquid obtained by reduction of pyrrole; 2,5-dihydro-pyrrole

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History and Etymology for pyrroline

International Scientific Vocabulary pyrrol- + -ine

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occurring twice a year or every two years

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