Samech
From BiblePortal Wikipedia
Hastings' Dictionary of the Bible [1]
Samech . The fifteenth letter of the Hebrew alphabet, and as such employed in the 119th Psalm to designate the 15th part, each verse of which begins with this letter.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]
(prop. Sa'mek, ס ; fully סָמֶךְ , a Prop ) , the fifteenth letter of the Heb. alphabet ( Psalms 119:113). (See Acrostic).
International Standard Bible Encyclopedia [3]
sam´ek (, ס ṣamekh ): The 15th letter of the Hebrew alphabet; transliterated in this Encyclopedia as ṣ . It came to be used for the number 60. For name, etc., see Alphabet .