Seer

"A person authorized of God to see with spiritual eyes things which God has hidden from the world (Moses 6:35–38). He is a revelator and a prophet (Mosiah 8:13–16). In the Book of Mormon, Ammon taught that only a seer could use special interpreters, or a Urim and Thummim (Mosiah 8:13; 28:16). A seer knows the past, present, and future. Anciently, a prophet was often called a seer (1 Sam. 9:9; 2 Sam. 24:11)."
​
"Joseph Smith is the great seer of the latter days (D&C 21:1; 135:3). In addition, the First Presidency and the Council of the Twelve are sustained as prophets, seers, and revelators." LDS.ORG 

Mosiah 8:15 And the king said that a seer is greater than a prophet.
16 And Ammon said that a seer is a revelator and a prophet also; and a gift which is greater can no man have, except he should possess the power of God, which no man can; yet a man may have great power given him from God.

17 But a seer can know of things which are past, and also of things which are to come, and by them shall all things be revealed, or, rather, shall secret things be made manifest, and hidden things shall come to light, and things which are not known shall be made known by them, and also things shall be made known by them which otherwise could not be known.

D&C 107:92 Behold, here is wisdom; yea, to be a seer, a revelator, a translator, and a prophet, having all the gifts of God which he bestows upon the head of the church.

By LDS.ORG