Sentence:  The philosophy behind this meeting was to bring together scientists who specialised in the incubation and physiology of avian embryos with those workers interested in reptilian eggs and embryos. Leading authorities within many fields of incubation, <WSD>oology</WSD> and embryology were invited to give a presentation reviewing current knowledge within their sphere of research. 
Meaning of the word marked with <WSD> tags:  The study of birds' eggs. (from 19th c.)