ren·i·form

[ren-uh-fawrm, ree-nuh-]
adjective
kidney-shaped: a reniform leaf; hematite in reniform masses.

Origin:
1745–50; < Neo-Latin rēniformis. See reni-, -form

sub·ren·i·form, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
reniform (ˈrɛnɪˌfɔːm) [Click for IPA pronunciation guide]
 
adj
having the shape or profile of a kidney: a reniform leaf; a reniform mass of haematite

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Reniform is always a great word to know.
So is doohickey. Does it mean:
a stew of meat, vegetables, potatoes, etc.
a gadget; dingus; thingumbob.
American Heritage
Medical Dictionary

reniform ren·i·form (rěn'ə-fôrm', rē'nə-)
adj.
Kidney-shaped.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
reniform   (rěn'ə-fôrm', rē'nə-)  Pronunciation Key 
Shaped like a kidney. Used to describe certain minerals and certain leaves.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Reniform nematode resistance in selected soybean cultivars.
Plants carrying this foreign gene were more resistant to several fungal pathogens and the reniform nematode.
Forewing is light gray to brown with a pale yellow or red reniform spot.
Cooperative research will be conducted to identify resistance and tolerance to the reniform nematode in cotton.
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