The following list shows most commonly used symbols in biology and their meaning arranged in a alphabetical manner. A is a biology symbol for Androecium A Adenine ABA Abscisic acid ATP Adenosine triphosphate Aa Heterozygous dominant AAAA Autotetraploid AABB Allotetraploid A Angstrom ( = 0.0001 of a micron) ADP is a biological symbol for Adenosine diphosphate ADA Adenosine deaminase AIDS Acquired immuno deficiency syndrome AMP Adenosine mono phosphate 1 Atmosphere 76.00 cm of Hg=1.Olx 1O Pa. ANS Autonomic Nervous system ACT Acoustic test facility ACTH Adreno cortico trophic hormone 5 Bro 5 Bromo uracil Br Bracteate flower.Bacteriophage BOD Biochemical oxygen demand C Corolla 1 dyne 105N CDP Cytosine diphosphate CTP Cytosine triphosphate CT Calcitonin Hormone Cyt Cytochrome Cp Compare CMP Cytosine monophosphate CVA Cerebrovascular accident CoA Coenzyme A C Cystosine COD Chemical Oxygen demand CIFRI Central inland fisheries research institute DNP Deoxyribo nucleoproteins. DPD Diffusion pressure deficit DPT Diphtheria, Pertussis, Tetanus Vaccine DNA Deoxyribose nucleic acid DPN Diphosphopyridine nucleotide EPR Electro paramagnetic resonance ECG Electro cardiograph EEG Electro encephalograph Ebr Ebracteate EMP Embden. Meyerhof Parnas pathway ELISA Enzyme linked Immuno Sorbant Epi Presence of epicalyx ETS Energy transfer system ER Endoplasmic reticulum EM Electron microscope FSH Follicle stimulating hormone FAD Flavin adenine dinucleotide FMN Flavin mono nucleotide F2 -Second filial generation. FADH2 Flavin idenine dinucleotide (reduced) F1 -First Filial generation. GMP Guanosine monophosphate GMF Genetically Modified Foad GMO Genetically modified Organisms GA Gibberellic acid G Guanine GH Growth hormone GTH Gonadotrophic hormone HCLV-.III Human cell leukaemia virus III HIV Human immuno deficiency virus ICSH Interstitial cells stimulating hormone IAA Indole—3— acetic acid ICRAF International council for research in Agroforest 1 Newton 1 x 1O dynes LH Luteinising hormone mRNA Messenger Ribose Nucleic acid 1 microgram 106 gm 1 microlitre (ml) 106 litre 1 Micrometre (mm) -lOm MET Magneto—encephlography MSH Melanocyte stimulating hormone NMRI Nuclear magnetic Resonance Imaging NAD Nicotinamide adeninedinucleotide NADH2 Nicotinamide adenine dinucleotide (reduced) NAA Naphthalene acetic acid. n Nanometre oc Oral Contraceptive oPv Oral Police Vaccine PEPA Phosphoenol pyruvic acid Pstd Pistillode PSI’ Pigment system II PAN Peroxyacyl nitrate PEM Protein energy malnutrition PPi Inorganic Pyrophosphate P Perianth PGA Phosphoglyceric acid PKU Phenylketonuria PS-I Pigment system PIH Protein inhibiting hormone PPLO Pleuro pneumonia-like organisms RH Releasing hormone RG Regulator gene RPF Rehal Plasma flow RUBP (RUDP) Ribulose biophosphate