Definition of prothallus in English:

prothallus

Syllabification: pro·thal·lus
Pronunciation: /prōˈTHaləs
 
/

noun (plural prothalli /-ˈTHalē, ˈTHalˌī/)

Botany
The gametophyte of ferns and other primitive plants.
More example sentences
  • Here I re-examine the formation of the prothallus in a fern gametophyte in the context of a ‘whole-plant’ developmental response.

Origin

mid 19th century: modern Latin, from pro-2 'before, earlier' + Greek thallos 'green shoot'.

Derivatives

prothallial

Pronunciation: /-ˈTHalēəl/
adjective
More example sentences
  • A consistent feature of every experiment that was undertaken in this study was that a sufficient quantity of white light was an absolute requirement for both prothallial and rhizoid development.
  • The grain is empty because the body cell and prothallial nuclei have moved out along the pollen tube towards the archegonia.

Definition of prothallus in:

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