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American Heritage® Illustrations
Unless otherwise notated, illustrations provided byThe American Heritage® Dictionary of the English Language, Fourth Edition
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R
- rabbet
- radar - The American Heritage® Science Dictionary
- radius
- raglan
- rainbow - The American Heritage® Science Dictionary
- rainforest - The American Heritage® Science Dictionary
- rampant
- reamer
- receiver
- red oak
- reentrant angle
- reflex angle
- refraction - The American Heritage® Science Dictionary
- refraction
- regardant
- reniform
- reverse osmosis
- respiration - The American Heritage® Science Dictionary
- respiratory system - The American Heritage® Science Dictionary
- respiratory system
- reverse osmosis - The American Heritage® Science Dictionary
- reflecting telescope
- refracting telescope
- rheumatoid arthritis
- rhizome
- rhizome - The American Heritage® Science Dictionary
- rhombohedron
- rhombus
- right angle
- rip current - The American Heritage® Science Dictionary
- RNA - The American Heritage® Science Dictionary
- rocket engine - The American Heritage® Science Dictionary
- rolamite
- Romania
- rubber plant
- runcinate
- Russia
- Rwanda
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