rhodopsin

noun 0.780

photopigment

noun 0.650

photoreceptor

noun 0.646

bacteriorhodopsin

noun 0.622

opsonin

noun 0.596

retinal

noun 0.585

optic

noun 0.585

operon

noun 0.576

photosensor

noun 0.574

oxidase

noun 0.566

cone cell

noun 0.565

ops

noun 0.558

optics

noun 0.557

oper

noun 0.555

ophthalmoscope

noun 0.555

chromophore

noun 0.553

optical

noun 0.552

photoprotein

noun 0.552

retina

noun 0.550

occipital

noun 0.549

receptor

noun 0.546

otoscope

noun 0.545

orcein

noun 0.541

photoreception

noun 0.540

optometrist

noun 0.534

spectroscope

noun 0.534

optic nerve

noun 0.534

phototransduction

noun 0.532

sense organ

noun 0.531

oxygenase

noun 0.530

cryptochrome

noun 0.530

visual purple

noun 0.527

olfactory organ

noun 0.526

omer

noun 0.525

eyespot

noun 0.525

retinene

noun 0.523

optician

noun 0.521

retinol

noun 0.520

photosystem

noun 0.519

phytochrome

noun 0.519

protanopia

noun 0.518

optometry

noun 0.516

odorant

noun 0.516

protoporphyrinogen oxidase

noun 0.515

achromat

noun 0.514

oximeter

noun 0.513

octopamine

noun 0.513

adrenoceptor

noun 0.513

oxy

noun 0.513

opsoclonus

noun 0.511

hemoglobin

noun 0.511

opsonization

noun 0.510

photosensitizer

noun 0.509

optical isomer

noun 0.508

photoresistor

noun 0.508

oxide

noun 0.507

rhodamine

noun 0.507

dioptric

noun 0.506

optical spectrum

noun 0.505

opal

noun 0.504

organoleptic

noun 0.504

retinula

noun 0.503

oculist

noun 0.502

octopus

noun 0.501

orexin

noun 0.501

eosin

noun 0.500