【医】 periadventitial
【医】 adventitia; adventitial coat; ectoblast; ectosac; extima; extine
theca externa; tunica adventitia; tunica externa; tunica extima
all; all over; circuit; circumferenc; cycle; thoughtful; week
【计】 REV
【化】 peri
【医】 para-; peri-; perimeter