(in mosses, ferns, etc.) one of the rootlike filaments by which the plant is attached to the substratum.

1855–60; rhiz- + -oid

rhizoidal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To rhizoidal
World English Dictionary
rhizoid (ˈraɪzɔɪd)
any of various slender hairlike structures that function as roots in the gametophyte generation of mosses, ferns, and related plants

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
American Heritage
Medical Dictionary

rhizoid rhi·zoid (rī'zoid')

  1. Rootlike.

  2. Having rrregular branching. Used of a form of bacterial growth.

  1. A slender rootlike filament by which mosses, liverworts, and fern gametophytes attach to the substratum and absorb nourishment.

  2. A rootlike extension of the thallus of a fungus.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
rhizoid   (rī'zoid')  Pronunciation Key 
  1. A slender, rootlike filament by which mosses, liverworts, and the gametophytes of ferns attach themselves to the material in which they grow.

  2. A branching, rootlike extension by which algae and fungi absorb water and nutrients.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature