Explanation:

acarology study of mites

accidence GRAMMAR book; science of inflections in grammar

aceology therapeutics

acology study of medical remedies

acoustics science of sound

adenology study of glands

aedoeology science of generative organs

aerobiology study of airborne organisms

aerodonetics science or study of gliding

aerodynamics dynamics of gases; science of movement in a flow of air or gas

aerolithology study of aerolites; meteorites

aerology study of the atmosphere

aeronautics study of navigation through air or space

aerophilately collecting of air-mail stamps

aerostatics science of air pressure; art of ballooning

agonistics art and theory of prize-fighting

agriology the comparative study of primitive peoples

agrobiology study of plant nutrition; soil yields

agrology study of agricultural soils

agronomics study of productivity of land

agrostology science or study of grasses

alethiology study of truth

algedonics science of PLEASURE and pain

algology study of algae

anaesthesiology study of anaesthetics

anaglyptics art of carving in bas-relief

anagraphy art of constructing catalogues

anatomy study of the structure of the body

andragogy science of teaching adults

anemology study of winds

angelology study of angels

angiology study of blood flow and LYMPHATIC system

anthropobiology study of HUMAN biology

anthropology study of human cultures

aphnology science of WEALTH