plural nountreated as singular
Introductory study, especially of the literary and external history of the Bible prior to exegesis.‘Because this book is not an introduction in the usual sense, its classroom use should be complemented by a work like that of R. K. Harrison so that issues of isagogics are addressed.’
Mid 19th century plural of isagogic, via Latin from Greek eisagōgikos, from eisagōgē ‘introduction’, from eis ‘into’ + agein ‘to lead’.
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