A principal meridian is a meridian used for survey control in a large region.
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Famous quotes containing the words principal and/or meridian:
“We must reserve a back shop all our own, entirely free, in which to establish our real liberty and our principal retreat and solitude.”
—Michel de Montaigne (1533–1592)
“to these
Hale dead and deathless do the women of the hill
Love for ever meridian through the courters’ trees
And the daughters of darkness flame like Fawkes fires still.”
—Dylan Thomas (1914–1953)