Zettameter
"Zettameter" in a Sentence (3 examples)
On the other extreme, our galaxy (we call it the Milky Way) is about 0.9 Zm (Zettameters, 100 million trillion meters) in diameter.
What is the speed of light in Zm (zettameters) per second?
The size scale for the nuclear chemistry laboratory ranges from zeptometers (10⁻²¹ m) to zettameters (10²¹ m).
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.