protoplanetary nebula

名词 n.
中文释义

英文释义

名词 n.
  1. A stage in stellar evolution when a star starts to shed its outer layers before coming a true planetary nebula.

词形变化

protoplanetary nebulae plural protoplanetary nebulas plural

词源

Etymology tree
Proto-Indo-European *per-der.?
Proto-Indo-European *per-der.?
Proto-Indo-European *pér
Proto-Indo-European *-o
Proto-Indo-European *próder.
Ancient Greek πρό (pró)
Ancient Greek -ᾰτος (-ătos)
Ancient Greek πρῶτος (prôtos)
Ancient Greek πρωτο- (prōto-)lbor.
English proto-
English planetary nebula
English protoplanetary nebula
From proto- + planetary nebula.
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