子层

sublayer

son / child / seed / egg / small thing / 1st earthly branch: 11 p.m.-1 a.m., midnight, 11th solar month (7th December to 5th January), year of the Rat / Viscount, fourth of five orders of nobility 五等爵位[wu3 deng3 jue2 wei4] / ancient Chinese compass point: 0° (north) / subsidiary / subordinate / sub-

(noun suffix)

to pile on top of one another / layer; stratum / floor (of a building); story / (math.) sheaf / classifier for layers

electron shell (in the atom)

electron shell number (chemistry)