Dictionary.com
definitions

isagogics

[ahy-suh-goj-iks]

noun (used with a singular verb)

introductory studies.
the branch of theology that is introductory to Bible study and exegesis.
Also isagogic, isagoge.

Origin of isagogics

First recorded in 1860–65; see origin at isagogic, -ics

isagogic

[ahy-suh-goj-ik]

adjective

introductory, especially to the interpretation of the Bible.

noun

isagogics.

Origin of isagogic

1820–30; < Latin īsagōgicus < Greek eisagōgikós. See isagoge, -ic
Related formsi·sa·gog·i·cal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for isagogics

isagogics

noun

(usually functioning as singular) introductory studies, esp in the history of the Bible
Derived Formsisagogic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012