| acquired abnormality | http://bioportal.bioontology.org/ontologies/umls/sty/T020 | acquired abnormality | |
| activity | http://bioportal.bioontology.org/ontologies/umls/sty/T052 | activity | |
| age group | http://bioportal.bioontology.org/ontologies/umls/sty/T100 | age group | |
| alga | http://bioportal.bioontology.org/ontologies/umls/sty/T003 | alga | |
| amino acid | http://bioportal.bioontology.org/ontologies/umls/sty/T116 | amino acid, peptide, or protein | |
| amino acid, peptide, or protein | http://bioportal.bioontology.org/ontologies/umls/sty/T116 | amino acid, peptide, or protein | |
| amino acid sequence | http://bioportal.bioontology.org/ontologies/umls/sty/T087 | amino acid sequence | |
| amphibian | http://bioportal.bioontology.org/ontologies/umls/sty/T011 | amphibian | |
| anatomical abnormality | http://bioportal.bioontology.org/ontologies/umls/sty/T190 | anatomical abnormality | |
| anatomical structure | http://bioportal.bioontology.org/ontologies/umls/sty/T017 | anatomical structure | |
| animal | http://bioportal.bioontology.org/ontologies/umls/sty/T008 | animal | |
| antibiotic | http://bioportal.bioontology.org/ontologies/umls/sty/T195 | antibiotic | |
| archaeon | http://bioportal.bioontology.org/ontologies/umls/sty/T194 | archaeon | |
| bacterium | http://bioportal.bioontology.org/ontologies/umls/sty/T007 | bacterium | |
| behavior | http://bioportal.bioontology.org/ontologies/umls/sty/T053 | behavior | |
| biogenic anime | http://bioportal.bioontology.org/ontologies/umls/sty/T124 | neuroreactive substance or biogenic amine | |
| biologically active substance | http://bioportal.bioontology.org/ontologies/umls/sty/T123 | biologically active substance | |
| biologic function | http://bioportal.bioontology.org/ontologies/umls/sty/T038 | biologic function | |
| biomedical occupation or discipline | http://bioportal.bioontology.org/ontologies/umls/sty/T091 | biomedical occupation or discipline | |
| biomedical or dental material | http://bioportal.bioontology.org/ontologies/umls/sty/T122 | biomedical or dental material | |
| bird | http://bioportal.bioontology.org/ontologies/umls/sty/T012 | bird | |
| body location | http://bioportal.bioontology.org/ontologies/umls/sty/T029 | body location or region | |
| body location or region | http://bioportal.bioontology.org/ontologies/umls/sty/T029 | body location or region | |
| body part | http://bioportal.bioontology.org/ontologies/umls/sty/T023 | body part, organ, or organ component | |
| body part, organ, or organ component | http://bioportal.bioontology.org/ontologies/umls/sty/T023 | body part, organ, or organ component | |
| body region | http://bioportal.bioontology.org/ontologies/umls/sty/T029 | body location or region | |
| body space | http://bioportal.bioontology.org/ontologies/umls/sty/T030 | body space or junction | |
| body space or junction | http://bioportal.bioontology.org/ontologies/umls/sty/T030 | body space or junction | |
| body substance | http://bioportal.bioontology.org/ontologies/umls/sty/T031 | body substance | |
| body system | http://bioportal.bioontology.org/ontologies/umls/sty/T022 | body system | |
