participial adjective
Definition - An adjective that originated as and has the form of a participle.

Example -
The working in the phrase working women.

Etymology -
The term was coined by Samuel Johnson for use in his dictionary (see OED quote below).

Oxford English Dictionary -
Its first citation is from 1755:
"A thinking man, a man of prudence; a pacing horse, a horse that can pace; these I have ventured to call participial adjectives."
(Johnson Dict. Pref. 336)

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