Zodiac celestial coordinate system, or more specifically an ecliptic coordinate system, which takes the ecliptic as the origin of latitude and the Sun's position at vernal equinox as the origin of longitude. The English word ' derives from ', the Latinized form of the Ancient Greek "zōidiakòs kýklos" (), meaning "cycle or circle of little animals". "Zōidion" () is the diminutive of "zōion" (, "animal"). The name reflects the prominence of animals (and mythological hybrids) among the twelve signs. The zodiac was in use by the Roman era, based on concepts inherited by Hellenistic astronomy from Babylonian astronomy of the Chaldean
Fearn (letter) Fearn (letter) Fearn is the Irish name of the third letter of the Ogham alphabet, ᚃ, meaning "alder-tree". In Old Irish, the letter name was Fern, which is related to Welsh "gwern(en)". Its Primitive Irish root was *"wernā" and its phonetic value then was [w]. Its Old Irish and modern phonetic value is [f]. In the medieval kennings, called "Bríatharogam" or "Word Ogham" the verses associated with "Fearn" are: airenach fían - "vanguard of warriors" in the Word Ogham of "Morann mic Moín" comét lachta - "milk container" in the Word Ogham of "Mac ind Óc" (vessels where made of