The word "adluminal" refers to the inner lining of a tubular structure, such as a blood vessel, duct or organ. It is pronounced /ædˈluːmɪnəl/, which is written in IPA phonetic transcription. The first syllable "ad" is pronounced like "add," followed by "loo" as in "loo or view." The "minal" is pronounced as "min-nal." The word potentially originates from Latin "ad," meaning "to," and "lumen," meaning "light." Adluminal coating or adluminal compartment is commonly used in biology and pharmaceutical contexts.