subdomainWiktionary 原文英美构词拆解subsub-前缀domaindomain词干sub-Under, beneath. · Subsidiary, secondary.词源说明From sub- + domain.释义名词noun1A domain or sphere that is part of a larger domain or sphere.2(Internet) A domain name that has been prefaced with additional parts separated with periods.3(Internet) An additional part prefaced to a domain name.同族词派生词 1subsubdomain