(military) A terrain or installation for testing weapons, military equipment, or tactics. / (figuratively) A venue or project in which new technologies, methods, or techniques are tested.

plural of proving ground

Glechoma hederacea, an aromatic, perennial, evergreen creeper of the mint family Lamiaceae.

plural of ground bass

simple past tense and past participle of ground loop

plural of ground loop

Third-person singular simple present indicative form of ground loop

(electricity) A (usually unwanted) current that flows between two points that are meant to be at the same potential, but are not.

(aviation) To suffer a ground loop manoeuvre.

plural of parade ground