phoneme: (linguistics) one of a small set of speech sounds that are distinguished by the speakers of a particular language
phone: (phonetics) an individual sound unit of speech without concern as to whether or not it is a phoneme of some language
phycomycetes: a large and probably unnatural group of fungi and funguslike organisms comprising the Mastigomycota (including the Oomycetes) and Zygomycota subdivisions of the division Eumycota; a category not used in all systems