空穴

kǒngxué
  1. (electronics) (positive) hole; cavity
  2. (physics, Mainland China) electron hole
  3. (positive) hole; cavity
  4. cavity; hole
  5. electron hole
  6. empty house

Wiktionary

Homographs

空穴 kòngxué electron hole (physics)

Entry Composition

=1 空 kōng
  1. empty
  2. air
  3. sky
  4. in vain
=1 空 kòng
  1. to empty
  2. vacant
  3. unoccupied
  4. space
  5. leisure
  6. free time
=1 空 kǒng
  1. (obsolete on its own in Standard Chinese) alternative form of 孔 (kǒng, “hole; cave; mouth”)
  2. alternative form of 孔 (kǒng, “hole; cave; mouth”)
2 穴 xué
  1. cave
  2. cavity
  3. hole
  4. acupuncture point
  5. Taiwan pr. xuè

Containing this entry

空穴來風 kōngxuéláifēng
  1. lit. wind from an empty cave (idiom)
  2. fig. unfounded (story)
  3. baseless (claim)