Hypertext Webster Gateway: "houseleek"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Houseleek \House"leek`\, n. [House + leek.] (Bot.)
A succulent plant of the genus {Sempervivum} ({S. tectorum}),
originally a native of subalpine Europe, but now found very
generally on old walls and roofs. It is very tenacious of
life under drought and heat; -- called also {ayegreen}.
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