Navneord på engelsk der begynder med O

• opsin — Navneord – Engelsk ～ retinal protein formed by the action of light on rhodopsin
• opsonin — Navneord – Engelsk ～ an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes
• opsonisation — Navneord – Engelsk ～ process whereby opsonins make an invading microorganism more susceptible to phagocytosis
• opsonization — Navneord – Engelsk ～ process whereby opsonins make an invading microorganism more susceptible to phagocytosis
• optative mood — Navneord – Engelsk ～ a mood (as in Greek or Sanskrit) that expresses a wish or hope; expressed in English by modal verbs
• optative — Navneord – Engelsk ～ a mood (as in Greek or Sanskrit) that expresses a wish or hope; expressed in English by modal verbs
• Optez — Navneord – Engelsk ～ an artificial language
• optic chiasma — Navneord – Engelsk ～ the crossing of the optic nerves from the two eyes at the base of the brain
• optic disc — Navneord – Engelsk ～ the point where the optic nerve enters the retina; not sensitive to light
• optic chiasm — Navneord – Engelsk ～ the crossing of the optic nerves from the two eyes at the base of the brain
• optic axis — Navneord – Engelsk ～ in a doubly refracting crystal, the line in the direction of which no double refraction occurs; "a crystal may have either one or two optic axes"
• optic — Navneord – Engelsk ～ the organ of sight
• optic disk — Navneord – Engelsk ～ the point where the optic nerve enters the retina; not sensitive to light
• optic nerve — Navneord – Engelsk ～ the cranial nerve that serves the retina
• optic axis — Navneord – Engelsk ～ a line that passes through the center of curvature of a lens so that light is neither reflected nor refracted; "in a normal eye the optic axis is the direction in which objects are seen most distinctly"
• optic cup — Navneord – Engelsk ～ (embryology) a two-walled cuplike depression that develops into the pigmented and sensory layers of the retina
• optical fiber — Navneord – Engelsk ～ a very thin fiber made of glass that functions as a waveguide for light; used in bundles to transmit images
• optical flint — Navneord – Engelsk ～ optical glass of high dispersion and high refractive index
• optical crown — Navneord – Engelsk ～ optical glass of low dispersion and low refractive index
• optical glass — Navneord – Engelsk ～ clear homogeneous glass of known refractive index; used to make lenses

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