1. A conidium, or exospore, of large size.
2. In fungi, the larger of two distinctively different-sized types of conidia in a single species, thick- or thin-walled and composed of 2 to 10 cells; characteristic of most dermatophytes and some other genera for example, Histoplasma, Fusarium.
[macro- + Mod. L. dim. fr. G. konis, dust]
pl. macroconidia; a large conidium produced by some fungi such as Microsporum spp.