1. An alternive term for the testis. ... Origin: G. Didymos, a twin, pl. Didymoi, testes ... 2. <suffix> A conjoined twin, with the first element of the complete word designating fused parts. ... See: -dymus, -pagus. ... Origin: G. Didymos, twin ... (21 Jun 2000) ... Found on http://www.encyclo.co.uk/local/20973