"Growing on or in close proximity to the surface of something; (of two surfaces) growing in close proximity", Early 18th cent.; earliest use found in John Evelyn (1620–1706), diarist and writer. From classical Latin adnāscent-, adnāscēns, present participle of adnāscī (also adgnāscī, agnāscī) to grow later or as an addition (to), to grow on from ad- + nāsci to be born. Compare earlier adnascence, adnascency.[adnascent etymology, adnascent origin, 英语词源]