Moss definition

môs, mŏs
Frequency:
To cover with moss.
verb
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To cover with a growth of moss.
verb
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Moss is a very small seedless plant that lives in moist places and grows in soft feathery patches.

An example of moss is the soft green plants that grow on the ground under a thick forest.

noun
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A patch or covering of such plants.
noun
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Any of various classes (esp. Bryopsida) of very small, green bryophytes having stems with leaflike structures and growing in velvety clusters on rocks, trees, moist ground, etc.
noun
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Any of various green, usually small nonvascular plants of the division Bryophyta. Mosses, unlike liverworts, have some tissues specialized for conducting water and nutrients. As in the other bryophytes, the diploid sporophyte grows on the haploid gametophyte generation, which supplies it with nutrients. Mosses often live in moist, shady areas and grow in clusters or mats. Sphagnum mosses play a crucial role in the ecology of peat bogs.
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Any of various other unrelated plants having a similar appearance or manner of growth, such as Irish moss, Spanish moss, and the club mosses.
noun
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Any of various green, usually small, nonvascular plants of the division Bryophyta, having leaflike structures arranged around the stem and spores borne in a capsule.
noun
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Any of various similar plants, as some lichens and algae.
noun
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A growth of these.
noun
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A surname​.
pronoun
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(computing) Acronym of MIME Object Security Services.
noun
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(software) Acronym of Map Overlay and Statistical System.
noun
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(software) Acronym of Microsoft Office SharePoint Server.
noun
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(trading) Acronym of Market Oriented Sector Selective talks.
noun
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Any of a number of plants that look like mosses but are not related to them. For instance, reindeer moss is a lichen, Irish moss is an alga, and Spanish moss is a bromeliad, a flowering plant.
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Other Word Forms

Noun

Singular:
moss
Plural:
mosses

Origin of moss

  • Middle English from Old English mos bog and from Medieval Latin mossa moss (of Germanic origin)

    From American Heritage Dictionary of the English Language, 5th Edition