Ma'anar ƙamus na Armillaria yana nufin wani nau'in fungi wanda aka fi sani da naman gwari na zuma, wanda ke da ƙwayar cuta a kan bishiyoyi da tsire-tsire. Wadannan fungi suna samar da rhizomorphs, masu tsayi, sirara, sifofi masu kama da tushen da zasu iya yadawa a karkashin kasa, suna cutar da kuma kashe tushen tsire-tsire. Sunan Armillaria ya fito ne daga kalmar Latin "armilla," wanda ke nufin munduwa, kuma yana nufin sifofi masu kama da zobe waɗanda galibi ana samun su akan tushen waɗannan fungi.