optical

noun 0.719

infrared astronomy

noun 0.687

optical microscope

noun 0.675

optics

noun 0.652

radio astronomy

noun 0.646

optical spectrum

noun 0.623

astrophotography

noun 0.623

astrophysics

noun 0.618

observatory

noun 0.614

neutrino astronomy

noun 0.614

adaptive optics

noun 0.609

optical power

noun 0.608

optical glass

noun 0.604

astrometry

noun 0.603

optometry

noun 0.598

optoelectronics

noun 0.589

telescope

noun 0.584

radio astronomer

noun 0.574

astronomer

noun 0.573

optical fibre

noun 0.572

ophthalmology

noun 0.568

optical activity

noun 0.560

refracting telescope

noun 0.555

space science

noun 0.551

ophthalmoscopy

noun 0.547

optic

noun 0.546

optical drive

noun 0.546

dioptrics

noun 0.542

oceanography

noun 0.541

reflecting telescope

noun 0.540

fibre optics

noun 0.540

solar telescope

noun 0.539

radio telescope

noun 0.538

spectroscopy

noun 0.538

oceanology

noun 0.532

astrology

noun 0.530

optical illusion

noun 0.529

optical character recognition

noun 0.528

microscopy

noun 0.528

optical delusion

noun 0.527

dioptric

noun 0.527

observation car

noun 0.527

interferometry

noun 0.526

astrophysicist

noun 0.525

astrobiology

noun 0.521

photonics

noun 0.520

optical flat

noun 0.519

celestial navigation

noun 0.517

astronautics

noun 0.516

ophthalmoscope

noun 0.516

optic nerve

noun 0.512

observing

noun 0.509

ornithology

noun 0.508

optical rotatory dispersion

noun 0.508

photometry

noun 0.508

planetary science

noun 0.505

optician

noun 0.501

polarimetry

noun 0.501

oculography

noun 0.501