Is the word “submillimeter” an adjective?

Is this sentence correct? It sounds weird:

The accuracy is sub-millimeter.

Is it OK to use “submillimeter” without the “-“?

Answer

Yes, it is indeed an adjective.

This is the definition given by Dictionary.com:

submillimeter adjective

less than a millimeter in size

(Spelt “submillimetre” in Australia and the UK)

Judging by a quick Google search, “submillimeter” should not be spelt with a hyphen.

Attribution
Source : Link , Question Author : Grigory Ilizirov , Answer Author : Dog Lover

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