“ADSS” head

Anchor Head

analog magnetic head

an old head on young shoulders

amplifying head

amount of sliting sleeve head

Amniotic head fold

ammeter head resistance

ambit [head or subhead of expenditure]

Aluminum alloy cylinder head

alternating-current erasing head

allen head screw

algal head

alcoholic femur head necrosis

airspeed head

air-cushioned head box

air-cell cylinder head

air pressure head