The Collaborative International Dictionary of English v.0.48:

Barbiers \Bar"biers\, n. (Med.)
   A variety of paralysis, peculiar to India and the Malabar
   coast; -- considered by many to be the same as beriberi in
   a chronic form.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Beriberi \Be`ri*be"ri\, n. [Singhalese beri weakness.]
   An acute disease occurring in India, characterized by
   multiple inflammatory changes in the nerves, producing great
   muscular debility, a painful rigidity of the limbs, and
   cachexy.
   [1913 Webster]

WordNet (r) 3.0 (2006):

beriberi
    n 1: avitaminosis caused by lack of thiamine (vitamin B1)

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "beriberi":
   Lombardy leprosy, anemia, ariboflavinosis, cachexia, chlorosis,
   deficiency anemia, dermatitis, goiter, greensickness,
   keratomalacia, kwashiorkor, maidism, malnutrition, night blindness,
   osteomalacia, osteoporosis, pellagra, pernicious anemia,
   protein deficiency, rachitis, rickets, scurvy, struma,
   vitamin deficiency, xerophthalmia