damping off


[dam-ping-awf, -of]
noun Plant Pathology.
a disease of seedlings, occurring either before or immediately after emerging from the soil, characterized by rotting of the stem at soil level and eventual collapse of the plant, caused by any of several soil fungi.


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adjective, damper, dampest.
slightly wet; moist: damp weather; a damp towel.
unenthusiastic; dejected; depressed: The welcoming committee gave them a rather damp reception.
moisture; humidity; moist air: damp that goes through your warmest clothes.
a noxious or stifling vapor or gas, especially in a mine.
depression of spirits; dejection.
a restraining or discouraging force or factor.
verb (used with object)
to make damp; moisten.
to check or retard the energy, action, etc., of; deaden; dampen: A series of failures damped her enthusiasm.
to stifle or suffocate; extinguish: to damp a furnace.
Acoustics, Music. to check or retard the action of (a vibrating string); dull; deaden.
Physics. to cause a decrease in amplitude of (successive oscillations or waves).
Verb phrases
damp off, to undergo damping-off.

1300–50; Middle English (in sense of def. 4); compare Middle Dutch damp, Middle High German dampf vapor, smoke

dampish, adjective
dampishly, adverb
dampishness, noun
damply, adverb
dampness, noun

damp, dampen, moist (see synonym study at the current entry).

1. dank, steamy. Damp, humid, moist mean slightly wet. Damp usually implies slight and extraneous wetness, generally undesirable or unpleasant unless the result of intention: a damp cellar; to put a damp cloth on a patient's forehead. Humid is applied to unpleasant dampness in the air: The air is oppressively humid today. Moist denotes something that is slightly wet, naturally or properly: moist ground; moist leather. 3. dankness, dampness, fog, vapor. 7. humidify. 8. slow, inhibit, restrain, moderate, abate.

1. dry.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
damp (dæmp)
1.  slightly wet, as from dew, steam, etc
2.  archaic dejected
3.  slight wetness; moisture; humidity
4.  See also firedamp rank air or poisonous gas, esp in a mine
5.  a discouragement; damper
6.  archaic dejection
7.  to make slightly wet
8.  (often foll by down) to stifle or deaden: to damp one's ardour
9.  (often foll by down) to reduce the flow of air to (a fire) to make it burn more slowly or to extinguish it
10.  physics to reduce the amplitude of (an oscillation or wave)
11.  music to muffle (the sound of an instrument)
[C14: from Middle Low German damp steam; related to Old High German demphen to cause to steam]

damping off
any of various diseases of plants, esp the collapse and death of seedlings caused by the parasitic fungus Pythium debaryanum and related fungi in conditions of excessive moisture

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

early 14c., probably in O.E., but no record of it. If not, probably from M.L.G. damp; ult. from P.Gmc. *dampaz. Originally "a noxious vapor;" sense of "moisture" is first attested 1706. Damper of a piano is from 1783; of a chimney, 1788; either or both of which led to various figurative senses.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
damping off  
Any of various diseases of seedlings that are caused by oomycetes, especially of the genus Pythium, and result in wilting and death.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Abbreviations & Acronyms
deoxyadenylic acid
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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