achromatic

a. 消色差的,非彩色的

accuser, accusingly, accustom, accustomed, accustomed to, ace, acerbic, acerbity, acetate, acetone, acetylene, ache, achievable, achieve, achieve one's goals, achievement, achiever, Achilles, Achilles' tendon, aching, achy, acid, acid rain, acidic, acidify, acidity, acidly, acidosis, acidulated, acidulous, acknowledge, acknowledged, acknowledgement, acknowledgement (also acknowledgment), acknowledging, acknowledgment, acme, acne, acolyte, aconite,