ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷- noun
also piggyback plant ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷-
: a glandular pubescent perennial herb ( Tolmiea menziesii ) of the family Saxifragaceae that is native to western No. America, has young plants borne at the junction of leaf blade and petiole, and is used as a foliage plant — called also youth-on-age