A1P3O1C3H4R1O1M3A1T1S1
20 points
APOCHROMATS is validvalid
APOCHROMAT, a type of lens that corrects chromatic and spherical aberration [n]
APOCHROMAT, an apochromatic lens or instrument [n]
APOCHROMAT, a type of lens that corrects chromatic and spherical aberration [n]
APOCHROMAT, an apochromatic lens or instrument [n]