兩性

两性
liǎngxìng
  1. male and female
  2. both types (acid and alkaline, positive and negative etc)
  3. (chemistry) amphoteric

CEDICT

chemistry

Entry Composition

1 兩 liǎng
  1. two
  2. both
  3. some
  4. a few
  5. tael, unit of weight equal to 50 grams (modern) or 1⁄16 of a catty 斤 jīn (old)
2 性 xìng
  1. nature
  2. character
  3. property
  4. quality
  5. attribute
  6. sexuality
  7. sex
  8. gender
  9. suffix forming adjective from verb
  10. suffix forming noun from adjective, corresponding to -ness or -ity
  11. essence

classifier: 個