As a pronoun co
is this; this one.
As a noun poration is
(biology) the formation of pores in a surface, or the pattern of such pores.
co
Translingual
Symbol
(
head)
The ISO 3166-1 two-letter (alpha-2) code for Colombia.
The molecular formula for carbon monoxide.
ISO 3166-1
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poration
English
Noun
(
en noun)
(biology) The formation of pores in a surface, or the pattern of such pores