Word:

Opeidoscope

O`pei´do`scope
n.1.(Physics) An instrument, consisting of a tube having one end open and the other end covered with a thin flexible membrance to the center of which is attached a small mirror. It is used for exhibiting upon a screen, by means of rays reflected from the mirror, the vibratory motions caused by sounds produced at the open end of the tube, as by speaking or singing into it.
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Opalescence
Opalescent
Opaline
opalise
Opalize
Opalotype
Opaque
opaque gem
opaquely
Opaqueness
OPC
OPCR
OPcw
OPDU
Ope
OPEC
-- Opeidoscope --
Opel
Opelet
Open
Open a credit
open account
open air
open box testing
open chain
open circuit
Open communion
Open court
Open Data-link Interface
Open DataBase Connectivity
Open DeathTrap
Open Desktop
Open diapason
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