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caroller
noun
someone
who
sings
carols
,
especially
Christmas
songs
,
usually
with
a
group
going
from
house
to
house
•
The
carollers
paused
on
the
doorstep
to
wish
the
elderly
couple
a
happy
Christmas
.
The
carollers
paused
on
the
doorstep
to
wish
the
elderly
couple
a
happy
Christmas
.
•
Every
December
,
Oliver
joins
a
band
of
carollers
that
tours
the
nearby
villages
.
Every
December
,
Oliver
joins
a
band
of
carollers
that
tours
the
nearby
villages
.
Early
19th
century
:
formation
from
carol
+
-er/-ler
;
double-l
spelling
follows
standard
British
orthography
.
controller
noun
a
handheld
electronic
device
with
buttons
,
joysticks
,
or
triggers
that
you
use
to
operate
a
video
game
,
drone
,
robot
,
or
other
machine
•
Ethan
pressed
the
buttons
on
his
controller
to
make
the
video-game
character
jump
.
Ethan
pressed
the
buttons
on
his
controller
to
make
the
video-game
character
jump
.
•
The
drone
responded
instantly
when
Mia
tilted
the
handheld
controller
.
The
drone
responded
instantly
when
Mia
tilted
the
handheld
controller
.
formed
from
the
verb
“
control
”
+
the
agentive
suffix
“
-er
”,
first
used
for
mechanical
devices
in
the
early
20th
century
noun
a
person
whose
job
is
to
direct
or
supervise
the
movement
or
operation
of
vehicles
,
machines
,
or
complex
systems
•
The
controller
told
the
pilot
to
circle
the
airport
until
the
runway
was
clear
.
The
controller
told
the
pilot
to
circle
the
airport
until
the
runway
was
clear
.
•
As
train
controller
,
Raj
monitors
dozens
of
arrivals
on
a
wall
of
screens
.
As
train
controller
,
Raj
monitors
dozens
of
arrivals
on
a
wall
of
screens
.
extension
of
device
sense
to
a
job
title
in
the
mid-20th
century
as
technology
required
dedicated
personnel
to
manage
complex
systems
noun
the
chief
accountant
in
a
company
or
organization
,
responsible
for
financial
records
,
budgets
,
and
reports
•
The
company
’
s
controller
prepared
the
annual
budget
report
.
The
company
’
s
controller
prepared
the
annual
budget
report
.
•
Our
controller
spotted
a
mistake
in
the
invoice
before
it
was
sent
.
Our
controller
spotted
a
mistake
in
the
invoice
before
it
was
sent
.
borrowed
into
accounting
in
the
late
19th
century
,
influenced
by
variant
spelling
“
comptroller
,”
itself
from
French
‘
controleur
’
microcontroller
noun
-
microcontroller
,
microcontrollering
,
microcontrollers
,
microcontrollered
a
small
computer
on
a
single
integrated
circuit
chip
that
includes
a
processor
,
memory
,
and
programmable
input
and
output
circuitry
,
used
especially
in
embedded
systems
to
control
devices
.
•
The
robot's
arm
is
controlled
by
a
small
microcontroller
.
The
robot's
arm
is
controlled
by
a
small
microcontroller
.
•
She
programmed
the
microcontroller
to
turn
on
the
lights
at
dusk
.
She
programmed
the
microcontroller
to
turn
on
the
lights
at
dusk
.
Coined
in
the
mid-1970s
from
"
microcomputer
"
+
"
controller
",
with
the
Intel
8048
being
one
of
the
first
commercial
single-chip
microcontrollers
.