protogenic (1)youdaoicibaDictYouDict[protogenic 词源字典]
"Original, primary; of or belonging to the first or earliest stage", Mid 19th cent.; earliest use found in George Edward Day (1815–1872), physician. Irregularly from ancient Greek πρωτογενής first-born, primeval + -ic.[protogenic etymology, protogenic origin, 英语词源]
protogenic (2)youdaoicibaDictYouDict
"Of a substance, molecular species, etc.: able to supply a hydrogen atom for protonation; proton-donating; = protic. Opposed to protophilic", 1930s; earliest use found in Journal of the American Chemical Society. From proto- + -genic. Compare German protogen, adjective.