1. 
[syn: common chickweed, Stellaria media]
The Collaborative International Dictionary of English v.0.48:
Chickweed \Chick"weed`\ (-w[=e]d`), n. (Bot.)
   The name of several caryophyllaceous weeds, especially
   Stellaria media, the seeds and flower buds of which are a
   favorite food of small birds.
   [1913 Webster]
WordNet (r) 3.0 (2006):
Stellaria media
    n 1: a common low-growing annual garden weed with small white
         flowers; cosmopolitan; so-called because it is eaten by
         chickens [syn: common chickweed, Stellaria media]