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2 definitions found
From:
DICT.TW English-Chinese Dictionary 英漢字典
gas·traea
/gæˈstriə/
原腸幼蟲
From:
Webster's Revised Unabridged Dictionary (1913)
Gas·træ·a
n.
Biol.
A
primeval
larval
form
;
a
double-walled
sac
from
which
,
according
to
the
hypothesis
of
Haeckel
,
man
and
all
other
animals
,
that
in
the
first
stages
of
their
individual
evolution
pass
through
a
two-layered
structural
stage
,
or
gastrula
form
,
must
have
descended
.
This
idea
constitutes
the
Gastræa
theory
of
Haeckel
.
See
Gastrula
.
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