a. [f. LICHEN sb. + -OUS.]

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  1.  Of, pertaining to, or consisting of lichens; of the nature of or resembling lichens; overgrown with lichens.

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1843.  Ruskin, Mod. Paint., I. II. I. vii. § 35. The … crumbling and lichenous texture of the Roslin stone.

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1876.  Geo. Eliot, Dan. Der., V. xxxvi. An effect something like that of a fine flower against a lichenous branch.

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1893.  Ruskin, Poetry Archit., I. vi. 85. The grey roof is warmed with lichenous vegetation.

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  2.  Pertaining to, or of the nature of, the skin-disease Lichen.

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1822–34.  Good’s Study Med. (ed. 4), IV. 125. Opium … threw out a most distressing lichenous rash.

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1872.  T. G. Thomas, Dis. Women (ed. 3), 152. With these, pruritus vulvæ and a lichenous eruption about the pubes are apt to appear.

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1879.  St. George’s Hosp. Rep., IX. 742. The skin being dotted all about with hard lichenous elevations.

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