chickweed

noun

any plant of the genus Stellaria, of the pink family, as S. media, a common Old World weed whose leaves and seeds are relished by birds.
any of various allied plants.

noun

any of various caryophyllaceous plants of the genus Stellaria, esp S. media, a common garden weed with small white flowers
mouse-ear chickweed any of various similar and related plants of the genus Cerastium

late 14c., chekwede, from chick + weed (n.). In Old English it was cicene mete “chicken food.”