On-line Dictionary
Theca
Theca
n.
A
sheath
; a
case
; as,
the
theca
, or
cell
, of an
anther
;
the
theca
, or
spore
case
, of a
fungus
;
the
theca
of
the
spinal
cord
.
Theca
n.
The
chitinous
cup
which
protects
the
hydranths
of
certain
hydroids
.
Theca
n.
The
more
or
less
cuplike
calicle
of a
coral
.
Theca
n.
The
wall
forming
a
calicle
of a
coral
.
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