Comedones
the plural word is comedones
comedo
A blackhead, or open comedo is a wide opening on the skin with a blackened mass of skin debris covering the opening. Despite their name, some blackheads can be yellowish in color. A comedo is a widened hair follicle which is filled with skin debris (keratin squamae), bacteria and oil (sebum). A closed comedo is a whitehead, while an open comedo is a blackhead. the plural of "comedo" is comedomes".
When the sebum plug of a comedo is exposed to air, it oxidizes and becomes a blackhead.
According to the NIH, it is called a comedo.
There is no plural form. Do and Do not are verbs
The plural form of him, her, or it is them. (objective pronouns)
Bridges is the plural form of bridge.
The plural form of "is" is "are."
The plural form of "I" is "we."
The plural form of "was" is "were."
"Groceries" is the plural form of "grocery."