THYMINE By N., Sam M.S. - 1 noun. a pyrimidine compound which is one of the four bases located in DNA. With regard to RNA, uracil takes the place of thymine. THYMINE: "You will be expected to identify all the components of DNA chains, including thymine." Related Psychology Terms URACIL CYTOPLASMIC Piaget’s Theory of Cognitive Development GUANINE CHILD PSYCHIATRY NORTHERN BLOT NUCLEOTIDE TRANSCRIPTION ALCOHOLIC ADDICTION ESTHETICS Cite this page: N., Sam M.S., "THYMINE," in PsychologyDictionary.org, April 29, 2013, https://psychologydictionary.org/thymine/ (accessed June 28, 2022).