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4 definitions found
From:
DICT.TW English-Chinese Dictionary 英漢字典
Ar·chae·an
/ɑrˈkiən/
(
a
.)太古化的
From:
Webster's Revised Unabridged Dictionary (1913)
Ar·chæ·an
a.
Ancient
;
pertaining
to
the
earliest
period
in
geological
history
.
From:
Webster's Revised Unabridged Dictionary (1913)
Ar·chæ·an
,
n.
Geol.
The
earliest
period
in
geological
period
,
extending
up
to
the
Lower
Silurian
.
It
includes
an
Azoic
age
,
previous
to
the
appearance
of
life
,
and
an
Eozoic
age
,
including
the
earliest
forms
of
life
.
Note:
☞
This
is
equivalent
to
the
formerly
accepted
term
Azoic
,
and
to
the
Eozoic
of
Dawson
.
◄
►
From:
WordNet (r) 2.0
archaean
adj
:
used
of
the
earliest
known
rocks
[
syn
:
archean
]
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