Gaaska la xidhiidha (APG), ama gaaska la xidhiidha, waa nooc ka mid ah gaaska dabiiciga ah ee laga helo keydka batroolka, ama ku milma saliidda ama "daboolka gaaska" oo bilaash ah oo ka sarreeya saliidda kaydka. Gaaska waxaa loo isticmaali karaa dhowr siyaabood ka dib marka la farsameeyo: oo la iibiyo oo lagu daro shabakadaha qaybinta gaaska dabiiciga ah, oo loo adeegsado soo saarista korantada goobta oo leh matoorro ama marawaxado, dib loogu celiyo dib-u-soo-kabashada labaad loona isticmaalo dib-u-soo-kabashada saliidda oo fiicnaata, laga beddelo gaaska dareeraha soo saara shidaalka la soo saaray, ama loo isticmaalo quudinta warshadaha kiimikada kiimikada.