Word: polysomnograph
Part of speech: Noun
Syllables: po
ly
som
no
graph
Definition: polysomnogram;  also abbreviated PSG
Morphemes:
Affix: poly-
Language: en
PoS: Prefix
Meaning: polymer
Etymology Compounds: Affix: πολύς
Language: grc
Decoded: polus
Meaning: many, much
Affix: somno-
Language: en
PoS: Prefix
Meaning: sleep
Affix: -graph
Language: en
PoS: Suffix
Meaning: that is written