Word: posteroseptum
Part of speech: Noun
Syllables: po
ste
ro
sep
tum
Definition: The ostium of the coronary sinus
Morphemes:
Affix: postero-
Language: en
PoS: Prefix
Meaning: posterior; back
Affix: septum
Language: en
PoS: Noun
Meaning: Either of the two walls that separate the atria or ventricles of the heart into left and right chambers.