| ultracentrifuge | (verb) subject to the action of an ultracentrifuge | - |
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| ululate | (verb) emit long loud cries | Synonyms: howl, roar, wail, yaup, yawl |
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| undulate | (verb) increase and decrease in volume or pitch, as if in waves | - |
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| (verb) move in a wavy pattern or with a rising and falling motion | Synonyms: flap, roll, wave |
| (verb) stir up (water) so as to form ripples | Synonyms: cockle, riffle, ripple, ruffle |
| (verb) occur in soft rounded shapes | Synonyms: roll |
| vascularise | (verb) make vascular | Synonyms: vascularize |
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| (verb) become vascular and have vessels that circulate fluids | Synonyms: vascularize |
| vascularize | (verb) make vascular | Synonyms: vascularise |
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| (verb) become vascular and have vessels that circulate fluids | Synonyms: vascularise |
| vault | (verb) bound vigorously | - |
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| (verb) jump across or leap over (an obstacle) | Synonyms: overleap |
| vermiculate | (verb) decorate with wavy or winding lines | - |
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| vesiculate | (verb) cause to become vesicular or full of air cells | - |
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| (verb) become vesicular or full of air cells | - |
| vulcanise | (verb) undergo vulcanization | Synonyms: vulcanize |
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| (verb) subject to vulcanization | Synonyms: vulcanize |
| vulcanize | (verb) undergo vulcanization | Synonyms: vulcanise |
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| (verb) subject to vulcanization | Synonyms: vulcanise |
| vulgarise | (verb) act in a vulgar manner | Synonyms: vulgarize |
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| (verb) debase and make vulgar | Synonyms: vulgarize |
| (verb) cater to popular taste to make popular and present to the general public; bring into general or common use | Synonyms: generalise, generalize, popularise, popularize, vulgarize |
| vulgarize | (verb) act in a vulgar manner | Synonyms: vulgarise |
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| (verb) debase and make vulgar | Synonyms: vulgarise |
| (verb) cater to popular taste to make popular and present to the general public; bring into general or common use | Synonyms: generalise, generalize, popularise, popularize, vulgarise |
| waul | (verb) make high-pitched, whiney noises | Synonyms: squall, wawl |
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