古太古代

Gǔtàigǔ Dài
  1. (geology) the Paleoarchean era (part of the Archean eon, spanning from 3.6 to 3.2 billion years ago)
  2. the Paleoarchean era (part of the Archean eon, spanning from 3.6 to 3.2 billion years ago)

Wiktionary

Entry Composition

=1 古 Gǔ surname Gu
=1 古 gǔ
  1. ancient
  2. old
  3. paleo-
=1 古 gù
  1. (obsolete on its own in Standard Chinese) alternative form of 固 (gù)
  2. (obsolete on its own in Standard Chinese) alternative form of 故 (gù)
  3. alternative form of 固 (gù)
  4. alternative form of 故 (gù)
=1 古 kū
  1. (obsolete on its own in Standard Chinese) only used in 古成
  2. only used in 古成
2 太古代 Tàigǔdài Archaeozoic (geological era before 2500m years ago)