WordNet (r) 3.0 (2006):

IDDM
    n 1: severe diabetes mellitus with an early onset; characterized
         by polyuria and excessive thirst and increased appetite and
         weight loss and episodic ketoacidosis; diet and insulin
         injections are required to control the disease [syn: type
         I diabetes, insulin-dependent diabetes mellitus, IDDM,
         juvenile-onset diabetes, juvenile diabetes, growth-
         onset diabetes, ketosis-prone diabetes, ketoacidosis-
         prone diabetes, autoimmune diabetes]