rub-, rubi-

(Latin: red, reddish)

erubescence (s) (noun)
A condition of redness or of being red from blushing: "When given an extravagant compliment, Helen’s face became very erubescence."
erubescent (adjective), more erubescent, most erubescent
Descriptive of something that is reddening or blushing: "After being in the sun for hours, Hans had the most erubescent face that his wife had ever seen."
rubedinous (adjective), more rubedinous, most rubedinous
Referring to a reddish color: "While Jason was walking, he saw that the lichens on the rocks had a very rebedinous color."
rubefacience (s) (noun) (no plural)
A medication that produces irritation or redness of the skin: "The salve the doctor prescribed for Kitty was a rubefacience which made her skin so red that she had to go back to the doctor to see if he could recommend a milder ointment to soothe her skin irritations."
rubefacient (s) (noun), rubefacients (pl)
An external application of a medication or any substance which causes redness as it irritates the skin: "As a result of applying a rubefacient, Athena increased the blood supply to her face which made her face become much redder than normal."
rubefaction (s) (noun), rubefactions (pl)
A redness of the skin which can be caused by the application of a counterirritant or an agent that causes irritation or a mild inflammation of the skin in order to relieve symptoms of a more serious inflammatory condition: "After Audy talked with the doctor about the skin cream he had given her, the doctor assured her that the rubefaction that she was experiencing was normal and that her skin would heal in a few days."
rubella (s) (noun) (no plural form)
1. A contagious viral disease characterized by a cough, a sore throat, a red rash, and which typically lasts only a few days; sometimes called German measles: "Hanna was confined to the house for a week while she recovered from rubella which she appears to have caught at school."
2. Etymology: from Latin, the plural form of rumellus, "reddish"; from Latin ruber, "red".
rubellite (s) (noun), rubellites (pl)
A red, usually transparent, crystalline or hard glassy mineral that is used as a gem and in optical and in electronic instrumentation: "The label in the box for the expensive watch, Laura received as a gift, stated that it had 14 rubellites in it."
rubeola (s) (noun), rubeolas (pl)
Another term for measles or an acute and highly contagious viral disease marked by distinct red spots on the body which is followed by a rash that occurs primarily with children: "Martha’s mother made her stay home from school for several days in hopes she would not catch the rubeola which was spreading throughout her school."
rubescence (s) (noun), rubescences (pl)
A condition of being reddish, or a process of blushing: "The rubescence that spread across the sky at sunset was spectacular."

"When Mark stumbled and fell down, he had a rubescence on his face because he was so embarrassed."

rubicund (adjective), more rubicund, most rubicund
1. Characterized with a red complexion: "Ruby's rubicund complexion was proof that she enjoyed walking and hiking outdoors quite often."
2. That which is inclined to redness; rosy: "Mona's mother exclaimed, 'That is the most rubicund sunburn I have ever seen!' "
rubicundity (s) (noun), rubicundities (pl)
A degree of redness or rosiness of complexion that indicates good health: "Mark has a rubicundity of cheeks because he is outdoors so often."
rubify (verb), rubifies; rubified; rubifying
To make or to cause something or someone to turn red or red-like: "The setting sun rubified the waters in the lake."

"Mason was abnormally sensitive to the summer sun and it overly rubified his skin; so, he had to be careful about staying outside without some skin protection."

rubiginous (adjective), more rubiginous, most rubiginous
Reddish-brown, rust-colored, or rusty-looking: "Zeek noticed the very old truck in the field and he thought it was the most rubiginous thing he had ever seen."
rubigo (s) (noun) (no plural)
A kind of rust that is on plants, consisting of a mildew or a parasitic fungus: "Rubigo is a plant disease that is caused by a rust fungus which is characterized by reddish or brownish spots on leaves, stems, and other parts of plants."