সদস্য হতে চায়
পৃষ্ঠার ঠিকানাটি ক্লিপবোর্ডে অনুলিপি করা হয়েছে।
optic disc
optic disk
optic nerve
optic radiation
optic tract
optical aberration
optical bench
optical condenser
optical crown
optical crown glass
optical density
optical device
optical disc
optical disk
optical fiber
optical fibre
optical flint
optical fusion
optical glass
optical illusion
optical instrument
optical lens
optical maser
optical opacity
optical phenomenon
optical prism
optical pyrometer
optical telescope
optician
optics