Search didym- didym-, 1. prefix meaning “testis”: didymalgia, didymitis, didymodynia. 2. prefix meaning “paired or twin”: didymous. Tweet Telegram VK Random Words balanced forearm orthosis (BFO) Breckinridge, Mary cytochrome P-450 Zimmermann reaction nerve cell Radiological Society of North America (RSNA) modafinil podalgia RotaTeq