English-Thai Dictionary
prothallus
N ระยะ เพศ ของ ต้น เฟิร์น prothallium
Webster's 1913 Dictionary
PROTHALLUS
Pro *thal "lus, n.; pl. Prothalli. Etym: [NL. , fr. Gr. (Bot. )
Defn: The minute primary growth from the spore of ferns and other Pteridophyta, which bears the true sexual organs; the oöphoric generation of ferns, etc.
New American Oxford Dictionary
prothallus
pro thal lus |prōˈTHaləs proʊˈθæləs | ▶noun ( pl. prothalli |-ˈTHalē, ˈTHalˌī | ) Botany the gametophyte of ferns and other primitive plants. DERIVATIVES pro thal li al |-ˈTHalēəl |adjective ORIGIN mid 19th cent.: modern Latin, from pro- 2 ‘before, earlier ’ + Greek thallos ‘green shoot. ’
Oxford Dictionary
prothallus
prothallus |prəʊˈθaləs | ▶noun ( pl. prothalli |-lʌɪ, -liː | ) Botany the gametophyte of ferns and related plants. DERIVATIVES prothallial adjective ORIGIN mid 19th cent.: modern Latin, from pro- 2 ‘before, earlier ’ + Greek thallos ‘green shoot ’.
The Wordsmith Dictionary