precambrianとは 意味・読み方・使い方

固有名詞

Pre-Cambrian

1. Alternative spelling of Precambrian

語源

From pre- +‎ Cambrian.

発音

• (Received Pronunciation) IPA: /priːˈkam.bɹɪ.ən/
• (General American) IPA: /priˈkæm.bɹi.ən/
• (Canada) IPA: /priˈkeɪm.bɹi.ən/, /priˈkæm.bɹi.ən/
• ハイフネーション: Pre‧cam‧bri‧an

形容詞

Precambrian (not comparable)

1. (informal, geology) Relating to the time and geology dated before the Phanerozoic
   • 1981, William Irwin Thompson, The Time Falling Bodies Take to Light: Mythology, Sexuality and the Origins of Culture, London: Rider/Hutchinson & Co., page 209:

     When you look at a Precambrian trilobite in the lobby of a New York bank, it is difficult to speculate about its primeval environment.

固有名詞

Precambrian

1. (geology) The Precambrian supereon; spanning from the formation of the Earth around 4.6 billion years ago to the emergence of hard-shelled creatures 541 million years ago.

使用する際の注意点

• The International Commission on Stratigraphy, which attempts to standardize the vocabulary of the field, is revising the boundaries between time periods based on physical-science methods rather than the kinds of fossils present.
• The boundary between the Precambrian and the Phanerozoic has been changed from time to time and will be subject to change, as will the eons listed as Hyponyms below.

同意語

• (geological supereon): Cryptozoic (archaic)

反意語

• Phanerozoic

下位語

• (geological supereon): Hadean, Archaean, Proterozoic - eons

等位語

• (geological supereon): Phanerozoic