Decamillennium

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A period of time consisting of ten thousand years. rare

    "A Millennium consists of one thousand years. / A Decamillennium is ten thousand years. / […] / A Centimillennium embraces a period of one hundred thousand years."

Synonyms

All synonyms
myriad

Example

More examples

"A Millennium consists of one thousand years. / A Decamillennium is ten thousand years. / […] / A Centimillennium embraces a period of one hundred thousand years."

Etymology

From deca- + millennium.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.