bird's-nest fungus: any of various fungi of the family Nidulariaceae having a cup-shaped body containing several egg-shaped structure enclosing the spores
fungus: an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia
ovipositor: egg-laying tubular structure at the end of the abdomen in many female insects and some fishes