sper·ma·tize \ˈ ̷ ̷ ̷ ̷ˌtīz\verb (-ed/-ing/-s) Etymology: Greek spermatizein to sow, from spermat- + -izein -ize intransitive verb obsolete: to produce or shed sperm transitive verb : to mingle spermatia or rarely sperm with : fertilize or diploidize (as rust fungi) by means of spermatia