球差

qiúchā
spherical aberration (optics)

CEDICT

  1. (optics) short for 球面像差 (qiúmiàn xiàngchā, “spherical aberration”)
  2. short for 球面像差 (qiúmiàn xiàngchā, “spherical aberration”)

Wiktionary

Entry Composition

=1 球 qiú ball used for playing games (variant of 球 qiú)
=1 球 qiú
  1. ball
  2. sphere
  3. globe
  4. ball game
  5. match

classifiers: 個, 場
2 差 chā
  1. difference; discrepancy
  2. (math.) difference (amount remaining after a subtraction)
  3. (literary) a little; somewhat; slightly