វគ្គជំនាញកុំព្យូទ័រ
ចំណេះដឹងទូទៅ
ម្ហូបអាហារ
កំប្លែង
ទស្សន៍ទាយ
តូច
មធ្យម
ធំ
Pyrolusite
ENGLISH MEANING
noun
1.
Manganese
dioxide
, a
mineral
of an
iron-black
or
dark
steel-gray
color
and
metallic
luster
,
usually
soft
. Pyrolusite
parts
with
its
oxygen
at a
red
heat
, and is
extensively
used
in
discharging
the
brown
and
green
tints
of
glass
(
whence
its
name
).