The Collaborative International Dictionary of English v.0.48:

Als \Als\, adv.
   1. Also. [Obs.] --Chaucer.
      [1913 Webster]

   2. As. [Obs.] --Chaucer.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ALS
    n 1: thickening of tissue in the motor tracts of the lateral
         columns and anterior horns of the spinal cord; results in
         progressive muscle atrophy that starts in the limbs [syn:
         amyotrophic lateral sclerosis, ALS, Lou Gehrig's
         disease]