■ noun Mathematics a triangular array of numbers in which those at the ends of the rows are 1 and each of the others is the sum of the nearest two numbers in the row above (the apex, 1, being at the top).
PASCAL'S TRIANGLE
Meaning of PASCAL'S TRIANGLE in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004