老人學家 (lou5 jan4 hok6 gaa1) — gerontologist in Cantoneselouˏ₅老janˎ₄人hokˍ₆學gaaˉ¹家简 老人学家Mandarin Pinyin: lao3 ren2 xue2 jia1Meaning of 老人學家noungerontologist