Illustration of corymb
corymb
noun
cor·ymb ˈkȯr-ˌim(b) 
ˈkär-,
-əm(b)
plural corymbs ˈkȯr-ˌimz
ˈkär-,
-əmz
: a flat-topped inflorescence
specifically : one in which the flower stalks arise at different levels on the main axis and reach about the same height and in which the outer flowers open first see inflorescence illustration
corymbose
ˈkȯr-əm-ˌbōs
adjective ˈkär-
Example Sentences
Recent Examples on the Web In spring, its tidy balls of blooms, known as corymbs, cover the shrub in white or pink. 
Ellen Nibali, baltimoresun.com, 4 May 2017
Ellen Nibali, baltimoresun.com, 4 May 2017 Word History
Etymology
French corymbe, from Latin corymbus cluster of fruit or flowers, from Greek korymbos
First Known Use
1794, in the meaning defined above