Fortified foods contain vitamin D in the form of either D2 or, more commonly, D3, which is the type produced by human skin exposed to sunlight. Salmon, tuna, swordfish and mackerel are examples of fish whose flesh contains vitamin D, notes the NIH Office of Dietary Supplements.
Definition of Wassermann test. : a test for the detection of syphilis using the Wassermann reaction âcalled also Wassermann.
Definition of helterâskelter for Students. 1  1 : in a confused and reckless manner Children raced helter-skelter through the house. 2  2 : in great disorder Toys were thrown helter-skelter around the room.