photomultiplier tube

noun 0.785

photomultiplier

noun 0.717

phototransistor

noun 0.715

electron tube

noun 0.710

photocathode

noun 0.709

vacuum tube

noun 0.702

fluorescent tube

noun 0.687

photodiode

noun 0.682

photodetector

noun 0.671

cathode-ray tube

noun 0.658

photosensor

noun 0.652

photoelectrode

noun 0.649

photoelectric cell

noun 0.636

photophore

noun 0.635

photovoltage

noun 0.633

photocell

noun 0.632

test tube

noun 0.631

photocurrent

noun 0.619

photoresistor

noun 0.617

photographic plate

noun 0.612

photometer

noun 0.611

tube

noun 0.610

phototransduction

noun 0.609

photoreceptor

noun 0.607

phot

noun 0.601

photosite

noun 0.597

phototroph

noun 0.593

photon

noun 0.592

hot cathode

noun 0.591

photopigment

noun 0.589

photoconductor

noun 0.580

tubule

noun 0.575

pitot tube

noun 0.573

photophone

noun 0.573

photogeneration

noun 0.568

photovoltaic cell

noun 0.567

photoflash

noun 0.567

photophase

noun 0.563

photoelectron

noun 0.559

tube site

noun 0.555

photosystem

noun 0.550

pentode

noun 0.550

fluorescent lamp

noun 0.548

photoprotein

noun 0.548

thermionic valve

noun 0.547

photog

noun 0.547

radiometer

noun 0.544

photonics

noun 0.543

photo

noun 0.543

nanotube

noun 0.542

photoresponse

noun 0.542

torpedo tube

noun 0.539

photic zone

noun 0.538

tub

noun 0.538

light source

noun 0.537

photocatalyst

noun 0.534

pollen tube

noun 0.533

tetrode

noun 0.533

photomicrograph

noun 0.533

photoconductivity

noun 0.533

photovoltaics

noun 0.532

light meter

noun 0.532

solar telescope

noun 0.530

phototaxis

noun 0.529

phototype

noun 0.528

lamp bulb

noun 0.528

photoprint

noun 0.528

electron gun

noun 0.528

photofit

noun 0.524

light globe

noun 0.523

photoconduction

noun 0.523

camera obscura

noun 0.523

phototropism

noun 0.521

lamp

noun 0.520

boiler tube

noun 0.519

photoproduction

noun 0.519

flashlamp

noun 0.518

photobioreactor

noun 0.517

neon lamp

noun 0.517

photoresist

noun 0.516

camera flash

noun 0.516

ampoule

noun 0.516

fluorescent

noun 0.515

cathode

noun 0.515

optocoupler

noun 0.514

photoreception

noun 0.514

tunnel diode

noun 0.514

connecting tubule

noun 0.513

spectrophotometer

noun 0.513

photomask

noun 0.512

phytochrome

noun 0.512

light bulb

noun 0.511

photoreaction

noun 0.510

luminophore

noun 0.509

cuvette

noun 0.509

exposure meter

noun 0.508

light gun

noun 0.507

camera

noun 0.504

light panel

noun 0.504

down tube

noun 0.504