アボガドロ数: (chemistry, physics) Avogadro's number (number of atoms present in 0.012 kilograms of isotopically pure Carbon-12)

Alternative form of 嚥 (en, “swallow; gulp down”): Only used in 咽下 (enka, enge, “swallowing (n.), to swallow (v.)”)

alkalinity

to investigate; to examine