No doubt about it, New York press lord Horace Greeley interviewing religious pioneer Brigham Young was a face-off between giants.

One of the issues they discussed in 1859 is suddenly back in the news: Should outsiders use the word "Mormon" to describe members of the Church of Jesus Christ of Latter-day Saints?

Greeley asked Young: "Am I to regard Mormonism (so-called) as a new religion, or as simply a new development of Christianity?"

The faith's second "prophet, seer and revelator" insisted that there is "no true Christian Church without a priesthood directly commissioned by and in immediate communication with the Son of God and Savior of mankind. Such a church is that of the Latter-day Saints, called by their enemies Mormons."

In recent decades, LDS leaders have made several attempts -- prior to the 2002 Winter Olympics in Utah, for example -- to distance themselves from the M-word. Now, the church's president has made another appeal for journalists, and everyone else, to avoid "Mormon" when referring to members of his church. To be blunt, he said he's on a mission from God.

"The Lord has impressed upon my mind the importance of the name He has revealed for His Church, even The Church of Jesus Christ of Latter-day Saints," wrote President Russell M. Nelson, repeating a message he voiced decades before reaching the top office. "We have work before us to bring ourselves in harmony with His will."

The church's new journalism "style" guide proclaims: "Please avoid using the abbreviation 'LDS' or the nickname 'Mormon' as substitutes for the name of the Church, as in 'Mormon Church,' 'LDS Church,' or 'Church of the Latter-day Saints.' When referring to Church members, the terms 'members of The Church of Jesus Christ of Latter-day Saints' or 'Latter-day Saints' are preferred."

Writers needing a shorter name are asked to use "the Church," the "Church of Jesus Christ" or the "restored Church of Jesus Christ." The word "Mormon" will continue to appear in proper nouns such as "The Book of Mormon," the "Mormon Trail" and perhaps even "The Mormon Tabernacle Choir."