Top Definitions
Quiz
Examples

thalloid

[ thal-oid ]

/ ˈθæl ɔɪd /

Save This Word!

adjective Botany, Mycology.

resembling or consisting of a thallus.

QUIZ

GOOSES. GEESES. I WANT THIS QUIZ ON PLURAL NOUNS!

Test how much you really know about regular and irregular plural nouns with this quiz.

Question 1 of 9

Which of the following nouns has an irregular plural form?

TAKE THE QUIZ TO FIND OUT

Origin of thalloid

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

Words nearby thalloid

thalidomide, thallic, thallium, thallium sulfate, thallo-, thalloid, thallophyte, thallous, thallus, thalweg, Thamar

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use thalloid in a sentence

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