aequator (Latin)

Where does "aequator" come from?

The Latin term 'aequator' is derived from the verb 'aequō,' meaning 'to make equal,' paired with the suffix '-tor' used to denote the person or thing performing an action. Rooted in the ancient Latin word 'aequus' for 'level' or 'equal,' the term historically identified someone who equalized or inspected coins. Over time, its meaning expanded to describe a line that divides a sphere into equal parts, eventually becoming our modern word 'equator.'

Full etymology tree

• aequator (Latin), 'coin inspector or assayer'
  • derived aequō (Latin), 'to equalize, make equal to something else, equate'
    • derived aequus (Latin), 'equal'
      • inherited aiquos (SCdB)
        • inherited *aikʷos (Proto-Italic)
    • suffix -ō (Latin), 'Used to form masculine nouns with various meanings:'
  • suffix -tor (Latin), '-er; used to form masculine agent nouns from verbs'

Ancestors

• aequo (Latin)
• -tor (Latin)

Descendants and derived words

• Ecuador (English)
• Ecuador (English)
• equator (English)
• équateur (French)
• Äquator (German)
• equatore (Italian)
• Äquator (Luxembourgish)
• equador (Portuguese)
• Equador (Portuguese)
• ecuator (Romanian)
• ecuador (Spanish)
• Ecuador (Spanish)

Updated July 2026

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Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris