Definition of Merlin's grass in English:

Merlin's grass

noun ˈməːlɪnz ɡrɑːsˈməːlɪnz ɡras

Any of the quillworts (genus Isoetes), plants allied to ferns which characteristically grow on lake bottoms; especially the European species I. lacustris and I. echinospora.

Origin

Early 19th century; earliest use found in James Edward Smith (1759–1828), botanist. Probably from the genitive of the name of Merlin + grass, apparently a mistranslation of Welsh gwair merllyn quillwort from gwair grass, hay + merllyn standing water, lake, pond; from either merf still, stagnant or marw dead + llyn lake, pool).

Definition of Merlin's grass in US English:

Merlin's grass

noun

Any of the quillworts (genus Isoetes), plants allied to ferns which characteristically grow on lake bottoms; especially the European species I. lacustris and I. echinospora.

Origin

Early 19th century; earliest use found in James Edward Smith (1759–1828), botanist. Probably from the genitive of the name of Merlin + grass, apparently a mistranslation of Welsh gwair merllyn quillwort from gwair grass, hay + merllyn standing water, lake, pond; from either merf still, stagnant or marw dead + llyn lake, pool).

词汇	Merlin's grass
释义	Definition of Merlin's grass in English: Merlin's grass noun ˈməːlɪnz ɡrɑːsˈməːlɪnz ɡras Any of the quillworts (genus Isoetes), plants allied to ferns which characteristically grow on lake bottoms; especially the European species I. lacustris and I. echinospora. Origin Early 19th century; earliest use found in James Edward Smith (1759–1828), botanist. Probably from the genitive of the name of Merlin + grass, apparently a mistranslation of Welsh gwair merllyn quillwort from gwair grass, hay + merllyn standing water, lake, pond; from either merf still, stagnant or marw dead + llyn lake, pool). Definition of Merlin's grass in US English: Merlin's grass noun Any of the quillworts (genus Isoetes), plants allied to ferns which characteristically grow on lake bottoms; especially the European species I. lacustris and I. echinospora. Origin Early 19th century; earliest use found in James Edward Smith (1759–1828), botanist. Probably from the genitive of the name of Merlin + grass, apparently a mistranslation of Welsh gwair merllyn quillwort from gwair grass, hay + merllyn standing water, lake, pond; from either merf still, stagnant or marw dead + llyn lake, pool).
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