na-adjective, noun which may take the genitive case particle 'no', noun
thousand-fold; a thousand times
Used to express a quantity or degree multiplied by one thousand. Can function as a noun, adjectival noun, or prenominal modifier.
この顕微鏡は千倍の倍率がある。
This microscope has a magnification of a thousand times.
千倍に薄めて使ってください。
Please dilute it a thousand-fold before use.