NOS

NOS (not comparable)

1. (medical diagnosis) Initialism of not otherwise specified.

   diffuse large B-cell lymphoma, not otherwise specified (DLBCL, NOS)

• (Not Otherwise Specified): used as the last qualifier in the definition of a class or category, as a punctuation period that restricts further narrowing of that specification, such as in the UN number for the transportation of dangerous goods; e.g., UN1956 is defined as "Compressed Gas, N.O.S."; whether it is flammable or inert is not specified, so it could be either.

NOS (countable and uncountable, plural NOSes)

1. Initialism of Near-Online Storage.
2. Initialism of Network Operating System.
3. Initialism of New Old Stock.
4. Acronym of nitrous oxide system.
5. Abbreviation of nitrous oxide.

• -son, NSO, ONS, SON, Son, ons, son