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
Meaning (philosophy of language) as he matured, he came to appreciate more and more the phenomenon of natural language. "Philosophical Investigations", published after his death, signalled a sharp departure from his earlier work with its focus upon ordinary language use. His approach is often summarised by the aphorism "the meaning of a word is its use in a language". However, following in Frege's footsteps, in the "Tractatus", Wittgenstein declares: "... Only in the context of a proposition has a name meaning." His work would come to inspire future generations and spur forward a whole new discipline, which explained meaning in a new way. Meaning