Noah Webster
Doctrinal
DOCTRINAL, adjective [See Doctrine.]
1. Pertaining to doctrine; containing a doctrine or something taught; as a doctrinal observation; a doctrinal proposition.
2. Pertaining to the act or means of teaching.
The word of God serveth no otherwise, than in the nature of a doctrinal instrument.
DOCTRINAL, noun Something that is a part of doctrine.