1) of or relating to biology or to life and living processes
2) used in or produced by applied biology
3) related by direct genetic relationship rather than by adoption or marriage <an adoptee who searched for years for her \biological parents>
bi·o·log·i·cal·ly -i-k(ə-)lē adv
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bi·o·log·i·cal (bi-o-lojґĭ-kəl) 1. pertaining to biology. 2. a medicinal preparation made from living organisms and their products, including serums, vaccines, antigens, antitoxins, etc.Medical dictionary. 2011.