petal
Concise Oxford English Dictionary © 2008 Oxford University Press:
petal/ˈpetl/
▶noun each of the segments of the corolla of a flower.
– derivatives
petaline adjective,
-petalled adjective,
petal-like adjective,
petaloid adjective.
petaline adjective,
-petalled adjective,
petal-like adjective,
petaloid adjective.
– origin C18: from mod. L. petalum (in late L. ‘metal plate’), from Gk petalon ‘leaf’, neut. (used as n.) of petalos ‘outspread’.
'petal' also found in these Oxford entries:

