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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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O
- Obama
- oblanceolate
- oblique angle
- obovate
- obtuse angle
- ocarina
- occlude
- octagon
- octahedron
- octastyle
- olecranon
- Oman
- open-hearth
- ophiolite suite - The American Heritage® Science Dictionary
- opposite - The American Heritage® Science Dictionary
- orbicular
- orbital - The American Heritage® Science Dictionary
- organic - The American Heritage® Science Dictionary
- origami
- osmosis - The American Heritage® Science Dictionary
- ovate
- overhand knot
- ovolo
- oyster mushroom
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