Scedosporium apiospermum Sce·do·spor·i·um a·pi·os·per·mum (sē'dō-spôr'ē-əm ā'pē-ŏs'pər-məm) n. The imperfect state of the fungus Pseudallescheria boydii, one of 16 species of fungi that may cause mycetoma in humans.