| Label | Id | |
|---|---|---|
| Alport syndrome | http://id.nlm.nih.gov/mesh/2021/D009394 | |
| alprazolam | http://id.nlm.nih.gov/mesh/2021/D000525 | |
| alprenolol | http://id.nlm.nih.gov/mesh/2021/D000526 | |
| alprostadil | http://id.nlm.nih.gov/mesh/2021/D000527 | |
| Alstroemeria | http://id.nlm.nih.gov/mesh/2021/D031402 | |
| altanserin | http://id.nlm.nih.gov/mesh/2021/C071983 | |
| Alternaria | http://id.nlm.nih.gov/mesh/2021/D000528 | |
| alternative mRNA splicing, via spliceosome | http://id.nlm.nih.gov/mesh/2021/D017398 | |
| alternatives to animal testing | http://id.nlm.nih.gov/mesh/2021/D000826 | |
| Alteromonas | http://id.nlm.nih.gov/mesh/2021/D020591 | |
| altitude | http://id.nlm.nih.gov/mesh/2021/D000531 | |
| altitude sickness | http://id.nlm.nih.gov/mesh/2021/D000532 | |
| altruism | http://id.nlm.nih.gov/mesh/2021/D000533 | |
| ALU element | http://id.nlm.nih.gov/mesh/2021/D020087 | |
| aluminium | http://id.nlm.nih.gov/mesh/2021/D000535 |