n. 孳生地, 孵卵所, 发生处

[医] 巢, 核; 病灶

Nidus \Ni"dus\, n.; pl. {nidi}. [L. See {Nidi}, {Nest}.]
A nest: a repository for the eggs of birds, insects, etc.; a
breeding place; esp., the place or substance where parasites
or the germs of a disease effect lodgment or are developed.