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Well attestedIndirect, via a person or title

Ferro meridian

noun · first attested 17th century

For three centuries longitude was counted from the edge of the known world.

A former prime meridian running through El Hierro in the Canary Islands.

El Hierro·Spain

27.7500°N -18.0000°W · Q1036287

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Record

Relationship
Indirect, via a person or title
Confidence
Well attestedThe place link is the standard scholarly account.
Attested
17th century
Part of speech
noun

Explanations here are written for this atlas. Dictionary text is not copied; the sources are linked so the claim can be checked.

How it traveled
  1. Step 1

    El Hierro

  2. In English

    Ferro meridian

The entry

Ferro is the old name for El Hierro, the westernmost of the Canaries and the last land Europeans knew of before the Atlantic. Ptolemy had put his zero at the Fortunate Isles, and a French decree of 1634 confirmed the choice; it was later defined as exactly twenty degrees west of Paris. German and Austrian maps were still printing longitudes from Ferro into the twentieth century.

Spain

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