Boyd’s Bible Dictionary:
(sent). (1) The celebrated pool, or tank, at Jerusalem, on the south side, near the opening of the Tyrophean valley into the Kidron valley. Originally a part of the water supply of the city (Neh. 3:15; Isa. 8:6; John 9:7-11). (2) An Unlocated tower whose fall killed eighteen men (Luke 13:4). Siloam still retains its ancient name under the form of the Arabic Silwan. It is partly hewn from rock and partly built with masonry. A flight of steps leads down to it. It is no longer a natural spring of fresh, limpid water, but is fed from the Fountain of the Virgin through a rock tunnel over 1700 feet in length. The waters are brackish and colored, and the walls and steps in ruins.
“Siloah, Siloam” From Concise Bible Dictionary:
A pool on the south of Jerusalem near the west slope of the Kidron valley. It is mentioned in the Old Testament as being “by the king’s garden” when the walls of Jerusalem were being rebuilt by Nehemiah (Neh. 3:15). In Isaiah 8:6, under the name of SHILOAH, it is used symbolically: the people refused its waters that went softly, preferring Syria and the king of Israel: the strong waters of Assyria should sweep them away. In the New Testament the man born blind, after being anointed with clay, was sent to wash at Siloam, which signifies “sent.” Christ being the Sent One, we are figuratively taught that light comes when Christ in humiliation is known as the Sent One of God (John 9:7,11).
The pool still exists under the name of the Birket Silwan. It is supplied with water from a fountain higher up the hill, called the Virgin’s Fountain. Several travelers have passed through the passage that connects the two, in some parts walking erect, and sometimes stooping, sometimes kneeling, and sometimes crawling on all fours. A short inscription was found at the pool, but which merely said that the passage was begun at both ends simultaneously, and met in the middle. The letters are ancient, which has led to the supposition that the passage was made in the days of Hezekiah, who made alterations in the watercourses (2 Chron. 32:3-4). The flow of the water is intermitting, as if regulated by an underground siphon. In the winter the water rises three or four times a day, but in the summer only once in several days. The superfluous water flows in a channel cut in the rock to the gardens below. The pool is about 53 feet long, 18 feet wide, and 19 feet deep.
Siloam Tunnel – Hezekiah’s Tunnel
“Siloam, Tower in” From Concise Bible Dictionary:
Nothing is known of the falling of this tower except what the scripture states in Luke 13:4. The village of Siloam is on the east slope of the Kidron valley, curiously formed as if ancient tombs had been appropriated, so that the houses appear to be clinging to the sides of the hill; it is not, however, known whether the tower was in any way connected with this village.
Strong’s Dictionary of Greek Words:
Meaning:
of Hebrew origin (7975); Siloam (i.e. Shiloach), a pool of Jerusalem
Jackson’s Dictionary of Scripture Proper Names:
Greek for Siloah
Potts’ Bible Proper Names:
One sent; dart; branch:―name of a tower, also of a pool in Jerusalem [SHILOAH and SILOAH], John 9:7. {Emissarius}