Sentence:  In the late nineteenth century, there was a huge upsurge of interest in natural history collections by scientists and ordinary citizens. Victorian homes were commonly decorated with collections of stuffed birds, and <WSD>oology</WSD>, the study and collection of eggs blown clean of their contents, was all the rage. 
Meaning of the word marked with <WSD> tags:  The hobby or practice of collecting birds' eggs, especially those of wild birds.