â¢ POSITIVE (noun) The noun POSITIVE has 1 sense: 1. a film showing a photographic image whose tones correspond to those of the original subject. Familiarity information: POSITIVE used as a noun is very rare. â¢ POSITIVE (adjective) The adjective POSITIVE has 11 senses: 1. characterized by or displaying affirmation or acceptance or certainty etc.
A fourth cousin is someone in a family who shares the same great-great-great-grandparents. First cousins share the same grandparents and second cousins have the same great-grandparents. Ordinal numbers of cousins are in the same generation as each other. For instance, all of the children of siblings are first cousins.
The DNA indicated that in this sample there are over 5,000 3rd cousin pairs and 30,000 4th cousin pairs. This result is important beyond thinking about genealogy. It means that large disease association studies that sample thousands of individuals will have many pairs of distant cousins in the dataset.