prothallial

 [proh-thal-ee-uhm]  

pro·thal·li·um

   [proh-thal-ee-uhm]
noun, plural pro·thal·li·a  [-thal-ee-uh] .
1.
Botany. the gametophyte of ferns and related plants.
2.
the analogous rudimentary gametophyte of seed-bearing plants.
Origin:
1855–60; < Neo-Latin < Greek pro- pro-2 + thallíon, diminutive of thallós young shoot; see -ium

Related forms
pro·thal·li·al, pro·thal·lic, pro·thal·line  [proh-thal-een, -ahyn] , adjective
pro·thal·loid, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Prothallial is always a great word to know.
So is slumgullion. Does it mean:
a gadget; dingus; thingumbob.
a stew of meat, vegetables, potatoes, etc.
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Collins
World English Dictionary
prothallus or prothallium (prəʊˈθæləs, prəʊˈθælɪəm)
 
—n , pl -li, -lia
botany the small flat free-living gametophyte that bears the reproductive organs of ferns, horsetails, and club mosses. It is either a green disc on the soil surface or it is colourless and subterranean
 
[C19: from New Latin, from pro- before + Greek thallus a young shoot]
 
prothallium or prothallium (prəʊˈθæləs, prəʊˈθælɪəm, -laɪ, -lɪə)
 
—n
 
[C19: from New Latin, from pro- before + Greek thallus a young shoot]
 
pro'thallic or prothallium
 
—adj
 
pro'thallial or prothallium
 
—adj

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