Charles Wolff is chief operating officer of the Roosevelt Center, not the president, as reported in yesterday's Style section. The center's president is Roger C. Molander.

White House chief of staff Donald T. Regan still hasn't lived down his condescending dismissal of women as not understanding or caring about complex military issues such as missile "throw-weights." Yesterday morning, however, Regan was asked to supply a definition of throw-weights and didn't produce all that clear a response.

Before the Geneva summit last November, Regan told The Washington Post that women are "not going to understand throw-weights or what is happening in Afghanistan . . . Some women will, but most women -- believe me, your readers for the most part, if you took a poll -- would rather read the human interest stuff of what happened." That comment caused the administration some embarrassment.

Asked yesterday to define "throw-weights" on NBC's "Today" show, Regan answered: "Well, from the point of view, it's the amount of actual warheads that come from the curve of the missile from the time it leaves until it actually lands and how much do you actually drop." That should make it perfectly clear. The State Department definition, however, is: "the useful weight placed on a trajectory toward the target by the boost or main propulsion stages of the missile." Regan would probably rather be asked about all that "human interest stuff." The New Old New Republic

Many young liberals grew up on The New Republic magazine. But since Marty Peretz purchased it, a number of loyal readers say they don't like the new New Republic. Their problems may be over. In the planning stage is a new magazine that's expected to become essentially the new old New Republic, even though it obviously isn't being described that way.

A prototype magazine, yet unnamed, that advocates a kind of "American liberalism" its founders believe doesn't exist anywhere else is expected by the end of the year. It is the brainchild of wealthy Chicago commodities dealer Richard Dennis, who also founded the Roosevelt Center think tank here; Charles Wolff, president of the Roosevelt Center; Hendrik Hertzberg, former New Republic editor and former Institute of Politics fellow at Harvard's Kennedy School of Politics, and Larry Smith, former top aide to Sen. Gary Hart.

Wolff said there are no decisions on job titles. But, he said, Hertzberg and Smith will handle the magazine's editorial responsibilities. "It will be a political journal and Smith is as good a political person as I know," he said. "And Hertzberg is as good a journalism person as I know." It also seems likely that the magazine will be headquartered in Washington. Tip's Bit of Tipperary

The president seemed to catch House Speaker Tip O'Neill a bit off guard when he saluted him at the beginning of Tuesday's State of the Union address. Come March 17, St. Patrick's Day, O'Neill will be ready for a salute on his 50th anniversary of public service by an impressive array of public figures that will include Bob Hope, former president Gerald Ford, Sens. Edward Kennedy and Robert Dole, AFL-CIO President Lane Kirkland and industrialist Armand Hammer.

Since it will be billed as a great St. Patrick's Day party, even Irish Prime Minister Garret FitzGerald will be there. He is flying in on the Concorde to be on time for a dinner, at which Irish singers Robert White, Tommy Makem and Liam Clancy will entertain. More than $1 million has already been committed for the dinner. All money raised that evening will go to the Thomas P. O'Neill Jr. Scholarship Fund at Boston College, where upon graduation in 1936, Tip was elected to the Massachusetts House to begin his political career. End Notes

This has been a big week for the Impressionist show at the National Gallery. Princess Margaret came for a visit on Tuesday, and yesterday, the "Face of France," reigning French beauty Catherine Deneuve, showed up to see the exhibit. She had lunch with gallery Director J. Carter Brown, who showed her around the exhibit. At this rate Brown may have a new career as tour guide . . .

Rep. Delbert Latta, ranking Republican on the House Budget Committee, is reportedly in good condition in the Cleveland Clinic, where he is recovering from triple bypass heart surgery. He underwent surgery on Tuesday and is expected to be back on the job in about six weeks.