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root cap
root cellar
root climber
root crop
root directory
root hair
root knot
root mean square
root nodule
root out
root pressure
root rot
root system
root up
root vegetable
rootage
rooted
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roost

roost [ roost ]


noun  (plural roosts)
Definition:
 
1. place where birds sleep: a place where a bird rests or sleeps, e.g. a perch or a building with perches for domestic fowl

2. birds sharing roost: a group of birds sharing a roost

3. temporary accommodations: a place where somebody may rest or sleep temporarily ( slang )



intransitive verb  (past and past participle roost·ed, present participle roost·ing, 3rd person present singular roosts)
Definition:
 
go to sleep: to rest or sleep on or in a roost
Starlings were roosting in the trees.

[ Old English hrōst, origin ?]

rule the roost to be the person who is in charge and who must be obeyed (informal)

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