What is "ayegreen"

Houseleek \House"leek`\, n. [House + leek.] (Bot.) A succulent plant of the genus Sempervivum ( Sempervivum 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.

n. The houseleek ((taxlink Sempervivum tectorum species noshow=1)).