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.
n. 1. A procedure for critical evaluation; a means of determining the presence, quality, or truth of something; a trial: a test of one's eyesight; subjecting a hypothesis to a test; a test of an athlete's endurance.2.. the means by which the presence, quality, or genuineness of anything is determined: a test of a new product. 2. the trial of the quality of something: to put to the test. 3. a particular process or method for trying or assessing. 4. a set of problems, questions, etc., for evaluating abilities or performance.