a.l., a.s. means auris laeva, auris sinistra - left ear in Prescription
Similar to a.l., a.s.
aa - ana - of each ad - ad - up to ad lib. - ad libitum - use as much as one desires; freely admov. - admove - apply agit - agita - stir/shake alt. h. - alternis horis - every other hour aq - aqua - water