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单词 prothallium
释义 prothallium
 —prothallial, prothallic, prothalline /proh thal"een, -uyn/,  adj.   —prothalloid,  adj.  
 /proh thal"ee euhm/,  n.  ,  pl.   prothallia /-thal"ee euh/.
  1.  Bot.   the gametophyte of ferns and related plants.
  2. the analogous rudimentary gametophyte of seed-bearing plants.
 [1855-60; < NL < Gk pro- PRO-2 + thallíon, dim. of thallós young shoot; see -IUM]
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