The plural form of adipocyte is adipocytes
The plural form of dermis is dermises.
Adipocyte
esophagogastroduodenoscopies is the plural form
The plural form of caboose is cabooses.
Slang is a collective term. It has no plural form.
The plural form for stimulus is stimuli.
The plural form for the noun verruca is verrucae.
The plural of stoma is stomata.
Bananen ("bananas") is already plural. It is the plural form of Banane ("banana").
plural-singular nouns
Mitochondria is already plural. The singular form is Mitochondrion.Mitochondria IS plural. The single form is mitochondrion.
The plural form of the noun artist is artists.The plural possessive form is artists' materials.