Sentence:  • <WSD>Oidia</WSD> are hyaline, small and thin-walled unicellular sections or fragments of the mycelium. / • <WSD>Oidia</WSD> may be uni- or binucleate as whether they are produced by the breaking up of the primary or secondary mycelium. 
Meaning of the word marked with <WSD> tags:  A fragile spore produced by some fungi.