sin/shin letter is always written without any dot, even in fully vocalized texts. This is because the second sin/shin is always silent. Unicode encoding Significance In gematria, Shin represents the number 300. The breakdown of its namesake, Shin[300] - Yodh[10] - Nunh[50] gives the geometrical meaningful number 360, which encompasses the fullness of the degrees of circles. Shin as a prefix commonly used in the Hebrew language carries similar meaning as specificity faring relative pronouns in English– "that (..)", "which (..)" and "who (..)". When used in this way, it is pronounced like 'sh' and 'eh'. In colloquial Hebrew, Kaph and Shin together have the meaning of "when". This is a contraction of , ka'asher (as, when). Shin is also one of the seven letters which receive special crowns (called tagin) when written in a Sefer Torah. See Gimmel, Ayin, Teth, Nun, Zayin, and Tzadi. According to Judges 12:6, the tribe of Ephraim could not differentiate between Shin and Samekh; when the Gileadites were at war with the Ephraimites, they would ask suspected Ephraimites to say the word shibolet; an Ephraimite would say sibolet and thus be exposed. From this episode we get the English word shibboleth. In Judaism Shin also stands for the word Shaddai, a name for God. Because of this, a kohen (priest) forms the letter Shin with his hands as he recites the Priestly Blessing. In the mid-1960s, actor Leonard Nimoy used a single-handed version of this gesture to create the Vulcan hand salute for his character, Mr. Spock, on Star Trek. The letter Shin is often inscribed on the case containing a mezuzah, a scroll of parchment with Biblical text written on it. The text contained in the mezuzah is the Shema Yisrael prayer, which calls the Israelites to love their God with all their heart, soul, and strength. The mezuzah is situated upon all the doorframes in a home or establishment. Sometimes the whole word Shaddai will be written. The Shema Yisrael prayer also commands the Israelites to write God's commandments on their hearts (Deut. 6:6); the shape of the letter Shin mimics the structure of the human heart: the lower, larger left ventricle (which supplies the full body) and the smaller right ventricle (which supplies the lungs) are positioned like the lines of the letter Shin. A religious significance has been applied to the fact that there are three valleys that comprise the