- allantochonion
- allantoic
- allantoidean
- allelocatalysis
- allelotaxis
- allenthesis
- allergic
- allergic diathesis
- allergire dermatitis
- allergist
- allergy
- allergy test
- alligatorboy
- allo-isomerism
- allobiosis
- allochroic
- allochroism
- allocortex
- allogamy
- allokeratoplasty
- allokinetic
- allomerism
- allongement
- allopath
- alloploid
- allopolyploidy
- allorhythmic
- allosome
- allotriosmia
- agnate
- agomphiasis
- agonad
- agonist
- agonistic muscle
- agony clot
- agranulocytosis
- agraphia amnemonica
- ague
- aid station
- aigesic
- ainhum
- air emboiism
- air requirement
- air sinus
- air vacuole
- airbrasive
- airembolism
- akaryote
- akinesia
- akinesia amnestica
- albino
- albinuria
- albipunctuate dystrophy
- albugo
- albuminimeter
- albuminold sputum
- albuminosis
- albumosuria
- alcaptonuria
- alcoholature
- aldosterone
- aldosteronoma
- alemmal
- alethia
- aleukemia
- aleukemic lymphadenosis
- aleukemic myelosis
- aleukocytic
- aleukocytosis
- alexeteric
- alexia
- alexinic
- alexipharmac
- alexithymia
- alexocyte
- alga reef
- algenesthesia
- algesia
- algesimetry
- algid
- algiometabolic
- algogenesia
- algolagmia
- algomenorrhea
- algophilla
- algophobia
- algoscopy
- alicyclic hydrocarbon
- alignment
- aliment
- alimentary anemia
- alimentary bolus
- alimentary obesity
- alimentary toxemia
- alimentation
- alimentology
- alipoidic
- alismin
- alkali reserve
- alkalin paper