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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clue for "RADII"

RADII: diameter halves; arm bones; half-diameters; bicycle spokes, e.g.; bones next to ulnae; straight sides of sectors; spokes, say; variables in (pi)r^2 and 2(pi)r