thalloid

[thal-oid]

adjective

Botany, Mycology.

1. resembling or consisting of a thallus.

Word History and Origins

Origin of thalloid¹

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

Example Sentences

The spore on germination forms a short filament which soon broadens out into the thalloid protonema.

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Rarely the thallus extends upward as a veil which surrounds the apothecia laterally and suggests how the thalloid exciple of higher families probably arose.

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The characteristics, then, of the mosses are, that the sexual generation is leafy, the one or two asexual generations are thalloid, and that the spore-bearing generation is in parasitic connection with the sexual generation.

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In thalloid forms a thinner marginal expansion or a definite wing increasing the surface exposed to the light can be distinguished from a thicker midrib serving for storage and conduction.

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In thalloid forms fimbriate or lobed margins or outgrowths from the surface lead to the same result.

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