Nouns starting with R

• reticulated python — Noun – English ～ of southeast Asia and East Indies; the largest snake in the world
• reticulation — Noun – English ～ an arrangement resembling a net or network; "the reticulation of a leaf"; "the reticulation of a photographic emulsion"
• reticulation — Noun – English ～ (photography) the formation of a network of cracks or wrinkles in a photographic emulsion
• reticule — Noun – English ～ a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument
• reticule — Noun – English ～ a woman's drawstring handbag; usually made of net or beading or brocade; used in 18th and 19th centuries
• Reticulitermes — Noun – English ～ includes species highly destructive to structures and living trees
• Reticulitermes flanipes — Noun – English ～ destructive United States termite
• Reticulitermes lucifugus — Noun – English ～ destructive European termite
• reticulocyte — Noun – English ～ an immature red blood cell containing a network of filaments or granules
• Reticulum — Noun – English ～ a small constellation in the southern hemisphere near Dorado and Hydrus
• reticulum — Noun – English ～ the second compartment of the stomach of a ruminant
• reticulum — Noun – English ～ any fine network (especially one in the body composed of cells or blood vessels)
• retina — Noun – English ～ the innermost light-sensitive membrane covering the back wall of the eyeball; it is continuous with the optic nerve
• retinal purple — Noun – English ～ a red photopigment in the retinal rods of vertebrates; dissociates into retinene by light
• retinal cone — Noun – English ～ a visual receptor cell in the retina that is sensitive to bright light and to color
• retinal — Noun – English ～ either of two yellow to red retinal pigments formed from rhodopsin by the action of light
• retinal detachment — Noun – English ～ visual impairment resulting from the retina becoming separated from the choroid in the back of the eye; treated by photocoagulation
• retinene — Noun – English ～ either of two yellow to red retinal pigments formed from rhodopsin by the action of light
• retinitis — Noun – English ～ inflammation of the retina
• retinoblastoma — Noun – English ～ malignant ocular tumor of retinal cells; usually occurs before the third year of life; composed of primitive small round retinal cells

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