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prothallic

 - 1 dictionary result

pro⋅thal⋅li⋅um

  [proh-thal-ee-uhm]
Use prothallic in a Sentence
–noun, plural -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; < NL < Gk pro- pro- 2 + thallíon, dim. 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. 2009.
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