Subjacent: Just beneath or underneath. The opposite of subjacent is superjacent. Other related terms include adjacent and circumjacent. From sub-, under + the Latin jacere, to lie = to lie under. From Healthy Resources 10 Rheumatoid Arthritis Symptoms How IL Inhibitors Work to Treat PsoriasisModerate to Severe UC: Targeted Solutions Featured Centers What Are the Best PsA Treatments for You?Understanding Biologics 10 Things People With Depression Wish You Knew