Potentially Infectious Biomedical Waste includes, but is not limited to the following: 1  Cultures and stocks of infectious agents and associated biologicals, including cultures from medical and pathological laboratories, from research and industrial laboratories.
1 (biology) During meiosis, the separation of chromosomes (homologous in meiosis I, and sister chromatids in meiosis II). ( 2 in mathematics): conjunction. ( 3 in mathematics): logical connective. ( in logic): inclusive disjunction.
home / medterms medical dictionary a-z list / nondisjunction definition Medical Definition of Nondisjunction Nondisjunction: Failure of paired chromosomes to separate (to disjoin) during cell division, so that both chromosomes go to one daughter cell and none go to the other. Nondisjunction causes errors in chromosome number, such as trisomy 21 (Down syndrome) and monosomy X (Turner syndrome). It is also a common cause of early spontaneous abortions. From