cold frame
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cold frame
n.
An unheated outdoor structure consisting of a wooden or concrete frame and a top of glass or clear plastic, used for protecting and acclimatizing seedlings and plants.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
cold frame
n
(Horticulture) an unheated wooden frame with a glass top, used to protect young plants from the cold
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
cold′ frame`
n.
a boxlike structure, usu. faced with glass, placed over a flower bed to protect plants, esp. seedlings.
[1850–55]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Cold frame
An outdoor shelter for young plants that is covered with glass or, at night, with canvas. Its purpose was to help plants make a successful transition from a Hotbed or the house to an unprotected garden.
1001 Words and Phrases You Never Knew You Didn’t Know by W.R. Runyan Copyright © 2011 by W.R. Runyan
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| Noun | 1. |  cold frame - protective covering consisting of a wooden frame with a glass top in which small plants are protected from the coldprotective cover, protective covering, protection - a covering that is intend to protect from damage or injury; "they had no protection from the fallout"; "wax provided protection for the floors" |
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