protoxylem
[proh-t
uh
-
zahy
-l
uh
m, -lem]
/ˌproʊ təˈzaɪ ləm, -lɛm/
noun
,
Botany
1.
the part of the
primary xylem
that develops first, consisting of narrow, thin-walled cells.
Origin
1895-1900;
proto-
+
xylem
Examples from the web for
protoxylem
During internode elongation only
protoxylem
vessels stained for the presence of lignin.
British Dictionary definitions for
protoxylem
protoxylem
/
ˌprəʊtəˈzaɪləm
/
noun
1.
the first-formed xylem tissue, consisting of extensible thin-walled cells thickened with rings or spirals of lignin
Compare
metaxylem
protoxylem
in Science
protoxylem
(prō'tə-zī'ləm)
The first formed xylem that differentiates from the procambium.