The Collaborative International Dictionary of English v.0.48:
Pearlwort \Pearl"wort`\, n. (Bot.) A name given to several species of Sagina, low and inconspicuous herbs of the Chickweed family. [1913 Webster]WordNet (r) 3.0 (2006):
pearlwort n 1: any of various low-growing plants of the genus Sagina having small spherical flowers resembling pearls [syn: pearlwort, pearlweed, pearl-weed]