Merriam-Webster
Merriam Webster: Dictionary Illustration: Types of Roofs
Labeled illustrations of mansard, gambrel, hip, and lean-to roofs.
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Merriam Webster: Dictionary Illustration: Skeleton
Detailed diagram of a skeleton with numbered labels.
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Merriam Webster: Dictionary Illustration: Tooth and Teeth
Labeled illustrations of parts of the tooth and of the different types of teeth in the mouth.
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Merriam Webster: Dictionary Illustration: Heart
Labeled illustration of the human heart, with callouts for the aorta, pulmonary artery, venticles, and atria.
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Merriam Webster: Dictionary Illustration: Violin
Labeled illustration of the principal parts of the violin.
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Merriam Webster: Dictionary Illustration: Eye Anatomy
Labeled illustration of the principal parts of the eye.
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Merriam Webster: Dictionary Illustration: Types of Architectural Arches
Labeled illustrations of different styles of arches along with an illustration of the principal parts of an arch: pier, impost, springer, voussoir, and keystone.
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Merriam Webster: Dictionary Illustration: Column Base
Labeled illustration of the principal parts of a column's base.
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Merriam Webster: Dictionary Illustration: Types of Notes
Labeled illustration of musical notes, whole note down to a sixty-fourth.
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Merriam Webster: Dictionary Illustration: Forms of Leaf
Labeled illustration of twenty-five types of leaves: pinnate, palmate, cordate, etc.
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Merriam Webster: Dictionary Illustration: Armor
A labeled illustration showing the different parts of a suit of armor.
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Merriam Webster: Dictionary Illustration: Duck
Labeled illustration of a male duck and its body parts, including its primary and secondary feathers.
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Merriam Webster: Dictionary Illustration: Ear
Labeled diagram of the anatomical parts of the ear.
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Merriam Webster: Dictionary Illustration: Cell
Labeled illustration of a plant and an animal cell and their parts.
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Merriam Webster: Dictionary Illustration: Brain
A labeled diagram of the main parts of the human brain.
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Merriam Webster: Dictionary Illustration: Respiratory System
Simple labeled diagram of the parts of the human respiratory system.
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Merriam Webster: Dictionary Illustration: Cones of Pines and Other Conifers
Labeled illustration showing the cones of nine different conifers.
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Merriam Webster: Dictionary Illustration: Incandescent Lamp
Labeled illustration of the parts of an incandescent lightbulb.
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Merriam Webster: Dictionary Illustration: Venation
Labeled illustration of three patterns of veins in leaves.
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Merriam Webster: Dictionary Illustration: Types of Sharks
Labeled illustration of five types of sharks: mako, tiger, thresher, hammerhead, and great white.
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Merriam Webster: Dictionary Illustration: Types of Bridges
Labeled illustration of five types of bridges: beam bridge, truss bridge, arch bridge, suspension bridge, and cable-stayed bridge.
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Merriam Webster: Dictionary Illustration: Airplane
Labeled illustration of the principal parts of an airplane, with callouts for cockpit, rudder, fuselage, etc.