Schema.org: what schema is best suited for covering pages of word definitions?

Hello!

I am looking into Schema.org as a means of improving SEO for our product.
It's pretty clear to me why it makes sense to use it, but I'm struggling to
choose an appropriate schema which fits my needs.

Our product can be described approximately as a kind of dictionary, where
word has its own page, which is composed of a brief definition, followed by
a more extensive elaboration on the meaning. Like so:

WORD [title]



definition paragraph


> description paragraph



- list of sources




So my question would be: what schema is best suited for my needs, and if no
of the existing options suffices, would you recommend me to create my own
scheme? I can imagine using existing schemes benefits SEO better, but I'm a
layman on the subject.

So far the best option seems to be the Article scheme, which has an
articleSection property which can be used to distinguish between definition
as description, however not semantically, so I wonder if there's a better
option I'm overlooking. Also, a decent property covering listed sources
seems to be lacking, since I don't consider citations and mentions to quite
respect the actual semantic meaning.

Thanks!