a.l., a.s. means auris laeva, auris sinistra - left ear in Prescription
Similar to a.l., a.s.
mL - millilitre MS - morphine sulfate�or�magnesium sulfate MSO4 - morphine sulfate N.M.T. - not more than N.T.E. - not to exceed nebul - nebula - a spray noct. - nocte - at night