thalloid

[ thal-oid ]

/ ˈθæl ɔɪd /

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resembling or consisting of a thallus.

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The rainy weather could not ________ my elated spirits on my graduation day.

First recorded in 1855–60; thall(us) + -oid

Stems thalloid, with large subquadrate succubous leaves; underleaves none.
The Manual of the Botany of the Northern United States|Asa Gray
In thalloid forms fimbriate or lobed margins or outgrowths from the surface lead to the same result.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3|Various
The protonema forms a flat, lobed, thalloid structure attached to the soil by rhizoids, and the plants arise from marginal cells.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3|Various
The spore on germination forms a short filament which soon broadens out into the thalloid protonema.
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3|Various

One thalloid form has already been described in Pellia (fig. 2).
Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3|Various