土壤学

acid extract

acid-fast staining

acid fermentation

acid forest soil

acid humification

acid humus

acidic lava

acidic rock(＝acidite)

acidification

acid igneous rock

acid-insoluble

acid ion

acidity

acid medium

acid number(＝acid value)

acidoid

acidoid-basoid ratio

acidophiles

acidophilia

acidophilic bacteria

acidophilous

acidophobous

acidosis

acid peat soil

acid phosphatase