empirical
em.pir.i.cal or em.pir.ic \-i-k*l\ \-ik\ \-i-k(*-)le-\ aj 1: relying on experience or observation alone often without due regard for system and theory 2: originating in or based on observation or experience 3: capable of being verified or disproved by observation or experiment { ~ laws} - em.pir.i.cal.ly av