defecation meaning
EN
[ˌdɛfɪˈkeɪʃən] [ˌdɛfəˈkeɪʃən] [-eɪʃən] WDefecation
- Defecation is the final act of digestion, by which organisms eliminate solid, semisolid, and/or liquid waste material from the digestive tract via the anus.
- Humans expel feces with a frequency varying from a few times daily to a few times weekly. Waves of muscular contraction (known as peristalsis) in the walls of the colon move fecal matter through the digestive tract towards the rectum.
- Open defecation is the practice of defecating outside or in public, i.e. without using a toilet of any kind, mostly due to extreme poverty in developing countries.
FR défécation 
- NounPLdefecationsPREdé-SUF-ation
Definition of defecation in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Countable nouns
- Nouns
- en defecations
Source: Wiktionary
Grammatically, this word "defecation" is a noun, more specifically, a countable noun.