鏡

Astronomy

Telescopium (constellation); the Telescope

spherical mirror

horn-rimmed glasses; horn-rimmed spectacles

water glass; hydroscope; box, etc. with glass bottom for viewing underwater

spectacled bear (Tremarctos ornatus)

speculum (bright patch on the wings of ducks)

bagua mirror (mirror used in divination in fengshui); pa kua mirror

convex mirror

spectacled cobra; Indian cobra; Asian cobra (Naja naja)

secondary mirror (in a reflecting telescope)

small ancient mirror tied with a cord

humphead wrasse (Cheilinus undulatus); Napoleon wrasse; Napoleonfish; Maori wrasse

spectacled owl (Pulsatrix perspicillata)

spectacled porpoise (Phocoena dioptrica)

Chemistry

silver mirror reaction

Proverb

even Homer nods; even a polished mirror conceals its reverse side

glasses cleaner; lens wipes

one-way mirror

concave glasses

stereoscope

helioscope

esophagoscope

arthroscopy

Medicine

arthroscope