As a noun thallus
is (botany) an undifferentiated plant body, such as in algae.
As an adjective filamentous is
having the form of threads or filaments; filamented.
thallus
English
Noun
(thalli)
(botany) An undifferentiated plant body, such as in algae.
(botany) Any plant body lacking vascular tissue.
Related terms
* thalliform
* thalline
* thallodal
* thalloid
* Thallobionta
* Thallophyta
* thallophyte
* thallose