What is the singular form of apparatus?

Answer 1

"At Langley, the preferred rules for forming possessives are as follows (G.P.O. 1984; and Rowland 1962):

• Form the possessive of a singular or plural noun not ending in s by adding 's.

• Form the possessive of a singular or plural noun ending in s by adding an apostrophe only"

Answer 2

The noun 'apparatus' is an uncountable noun, it has no plural form.

The noun 'apparatus' is a type of aggregate noun, a word representing an indefinite number of elements or parts.

Answer 3

The plural form of the noun phrase 'piece of equipment' is pieces of equipment.

The noun 'equipment' is an uncountable noun, a type of aggregate noun, a word that represents any number of elements or parts. It has no plural form. Units of equipment are expressed as some equipment, a lot of equipment, heavy equipment, etc.

Answer 4

Apparatus is the singular form and the plural form too. For example... Pass me that piece of apparatus. Or... Pass me those pieces of apparatus.

Answer 5

The plural form is apparatuses, although apparatus is most often used as an uncountable noun.