urinary calculus a calculus in any part of the urinary tract; it is vesical when lodged in the bladder and renal (see kidney stone) when in the renal pelvis. Common types named for their primary components are oxalate calculi, phosphate calculi, and uric acid calculi.
Clarence Gilyard Jr. was born on December 24, 1955 in Moses Lake, Washington, USA as Clarence Darnell Gilyard Jr. He is an actor and director, known for Walker, Texas Ranger (1993), Die Hard (1988) and Top Gun (1986). He is married to Elena. They have three children.
By Gary Graves, USA TODAY Willy T. Ribbs, the first African-American driver in the Indy 500 in 1991, signs autographs Sunday, one of several events he's involved in for the 100th anniversary race. By Gary Graves, USA TODAY. Willy T. Ribbs, the first African-American driver in the Indy 500 in 1991, signs autographs Sunday, one of several events he's involved in for the 100th anniversary race. And just as he did in becoming the race's first African-American driver in 1991, he's beginning at the grassroots level.