Cryptococcus neoformans

Etymology
Cryptococcus neoformans:

crypto: "hidden" (from greek κρυπτός (kryptos), meaning "hidden")

coccus: "berry" (from greek κόκκος (kokkos), meaning "berry")

neo: "new" (from greek νέος (neos), meaning "new")

forma: "shape" (from latin forma, meaning "shape")

Explanation
Cryptococcus neoformans is an encapsulated yeast, which, being a yeast, is shaped somewhat like a "berry" (coccus), however its capsule is so immense, 10 times its size, that it is effectively hidden (crypto) from phagocytes, particularly in immunocompromised patients. Note that since it doesn't have beta-1,3-glucan in its cell wall, we can remember it as a newer form (neoformans) compared to most fungi, which do. This makes echinocandins an ineffective treatment.

Note that the actual etymology of the latter half of its name is unknown to me.