English Words Starting With R

• rubify

  verb-transitiveVery Low
  /ˈruːbɪfaɪ/To make or become red; to redden.
• rubik cube

  nounB2
  /ˈruːbɪks kjuːb/A 3D combination puzzle invented by Ernő Rubik, featuring a cube with coloured faces that must be rotated to align all squares on each face to a single colour.
• rubik's cube

  nounB2
  /ˌruː.bɪks ˈkjuːb/A 3-D combination puzzle invented by Ernő Rubik, where each face is covered by nine stickers of one of six solid colours, and the objective is to return the cube to a state where each face is a single colour by rotating its segments.
• rubinstein

  nounLow
  /ˈruːbɪnˌstaɪn/A surname of German origin, most famously associated with the 19th-century Polish-American pianist and composer Anton Rubinstein, and the 20th-century Polish-American pianist Arthur Rubinstein.
• ruble

  nounB2
  /ˈruːb(ə)l/The basic unit of currency of Russia (and historically the Soviet Union).
• rublyov

  nounC1
  /ˈruːb(ə)l/The official currency unit of Russia and some other countries like Belarus.
• ruboff

  nounC1
  /ˌrʌb ˈɒf/To remove something by rubbing.
• rubout

  nounRare
  /ˈrʌbaʊt/The act of killing someone, especially in a planned or criminal manner; an assassination. It also refers to the complete removal or deletion of something by rubbing or erasing.
• rubric

  adjectivenounB2
  /ˈruː.brɪk/a heading or category; an established custom or set of instructions; a printed set of scoring criteria
• rubricate

  verbverb-transitiveC2 (Very Low Frequency)
  /ˈruːbrɪkeɪt/To add rubrics or headings; to highlight or mark in red or with distinctive colouring.
• rubrician

  nounVery Low (C2/Proficiency)
  /ruːˈbrɪʃ(ə)n/A person who is a specialist in or excessively devoted to rubrics, especially ecclesiastical rules and rituals.
• rubrum lily

  nounlow
  /ˈruːbrəm ˈlɪli/A specific horticultural variety of lily (Lilium) known for its red, or reddish, flowers.
• rubstone

  nounRare/Archaic
  /ˈrʌbstəʊn/A stone or whetstone used for sharpening, grinding, or polishing by friction.
• rubtsovsk

  nounRare (proper noun)
  /rʊbˈtsɒfsk/A city in southwestern Siberia, Russia.
• ruby

  adjectivenounB1
  /ˈruːbi/A precious red gemstone, a variety of the mineral corundum.
• ruby glass

  nounLow
  /ˈruː.bi ɡlɑːs/A type of glass that is coloured red by the addition of gold or selenium, historically produced for decorative objects and tableware.
• ruby laser

  nounC2
  /ˈruːbi ˈleɪzə(r)/A type of solid-state laser that uses a synthetic ruby crystal as the gain medium to produce a deep red light.
• ruby silver

  nounVery Rare
  /ˈruːbi ˈsɪlvə/A reddish silver ore, another name for proustite, consisting of silver sulfarsenide (Ag₃AsS₃).
• ruby spinel

  nounC2
  /ˈruːbi ˈspɪn(ə)l/A type of red spinel mineral that resembles a ruby in colour, historically often confused with true ruby.
• ruby-crowned kinglet

  nounC2
  /ˌruːbi kraʊnd ˈkɪŋlɪt/A very small North American songbird with a bright red patch on the top of the head of the male, which is usually concealed.

Showing 5401–5420 of 5802 words.