bi-lander
n.— «He said many patients take medication for high blood pressure at high elevation but do not need to at sea level. He coined the term “bi-landers” to describe second homeowners. He studied the monthly blood pressure fluctuations of 70 bi-landers for two years as they traveled from sea level to high elevation and back.» —“Blood pressure rises when some travel to Summit” by Kimberly Nicoletti Summit Daily News (Frisco, Colo.) Aug. 20, 2005. (source: Double-Tongued Dictionary)