prothallic

prothallium

[proh-thal-ee-uhm]
noun, plural prothallia [proh-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

prothallial, prothallic, prothalline [proh-thal-een, -ahyn] , adjective
prothalloid, adjective
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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

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