名詞 cretaceous:

1. from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
   同義詞：Cretaceous period

形容詞 cretaceous:

1. abounding in chalk
2. of or relating to or denoting the third period of the Mesozoic era

Cre.ta.ceous

adj.（形容詞）
Of, belonging to, or designating the geologic time, system of rocks, and sedimentary deposits of the third and last period of the Mesozoic Era, characterized by the development of flowering plants and the disappearance of dinosaurs.See table at geologic time
白堊紀(jì)的：屬于或表明地質(zhì)時(shí)期巖石體系以及中生代的第三和最后一個(gè)紀(jì)的沉積物的，此紀(jì)以有花植物的進(jìn)化和恐龍的滅絕為特征參見 geologic time
cretaceous Of, containing, or resembling chalk.
cretaceous 白堊的：白堊的、含白堊的或似白堊的
n.（名詞）
The Cretaceous Period.
白堊紀(jì)

來源：
From Latin crôt3ceus [chalky]
源自 拉丁語(yǔ) crôt3ceus [白堊的]
from crôta [chalk]
源自 crôta [白堊]
from Crôta (terra) [Cretan (earth)]
源自 白堊（土） [白堊的（土）]

【引伸】
creta.ceously
adv.（副詞）