English Words Starting With R

• rocket engine

  nounC1
  /ˈrɒk.ɪt ˌen.dʒɪn/A reaction engine that produces thrust by ejecting hot gases created from burning propellant, carrying its own oxidizer and not requiring atmospheric oxygen.
• rocket gun

  nounLow
  /ˈrɒk.ɪt ˌɡʌn/A portable weapon designed to launch unguided rockets or projectiles.
• rocket launcher

  nounC1/C2
  /ˈrɒk.ɪt ˌlɔːn.tʃə(r)/A portable device or vehicle-mounted system designed to fire rockets.
• rocket propulsion

  nounC2
  /ˈrɒk.ɪt prəˈpʌl.ʃən/The method or system of driving a vehicle forward by expelling exhaust gases produced by burning fuel within a rocket engine, operating on Newton's third law of motion.
• rocket science

  nounC1
  /ˈrɒk.ɪt ˌsaɪ.əns/The science or technology of designing, building, and launching rockets.
• rocket scientist

  nounC1
  /ˈrɒk.ɪt ˌsaɪ.ən.tɪst/A person who designs, builds, or operates rockets; an expert in rocket engineering or aerospace science.
• rocket ship

  nounMedium
  /ˈrɒk.ɪt ˌʃɪp/A vehicle designed for space travel, propelled by rocket engines.
• rocket sled

  nounC2 / Very Low
  /ˈrɒk.ɪt ˌsled/A vehicle that travels along a track or rails, propelled by the thrust of one or more rockets, used for high-speed testing, particularly in aeronautics and astronautics.
• rocketeer

  nounlow
  /ˌrɒk.ɪˈtɪə/A person who designs, builds, operates, or is an enthusiast in rockets and rocketry.
• rocketry

  nounC1
  /ˈrɒkɪtri/The science, technology, and practice of designing, building, and launching rockets.
• rocketsonde

  nounVery Low
  /ˈrɒk.ɪtˌsɒnd/A meteorological instrument launched by rocket to measure atmospheric conditions (temperature, pressure, wind) at high altitudes.
• rockeye

  nounVery Low (Technical/Zoological)
  /ˈrɒk.aɪ/A specific, chronic, often chronic infection or inflammation affecting the eye of a rockfish or other marine species, typically caused by parasitic flatworms.
• rockface

  nounLow
  /ˈrɒk.feɪs/The steep or vertical surface of a rock or cliff.
• rockfall

  nounLow
  /ˈrɒkfɔːl/A sudden and dangerous fall of rocks from a cliff or slope.
• rockfish

  nounLow
  /ˈrɒkfɪʃ/A marine fish that typically lives among rocks.
• rockford

  nounLow
  /ˈrɒk.fəd/A proper noun primarily referring to a place name, most notably a city in Illinois, USA.
• rockhampton

  nounC2
  /ˌrɒkˈhæmptən/A city in Queensland, Australia, located on the Fitzroy River.
• rockhopper

  nounLow
  /ˈrɒkˌhɒpə/A type of small, crested penguin (genus Eudyptes) known for its energetic 'hopping' movement over rocky shorelines.
• rockies

  nounplural-nounB2
  /ˈrɒk.iz/A proper noun referring to the Rocky Mountains, a major mountain range in western North America.
• rockiness

  nounC1
  /ˈrɒk.i.nəs/The quality or state of being rocky; full of rocks; unstable, uneven, or turbulent.

Showing 4421–4440 of 5802 words.