noun
also akene əˈkēn
( -s )
Etymology: New Latin achaenium, achenium, from a- (II) + Greek chainein to yawn + New Latin -ium — more at yawn
: a small dry indehiscent one-seeded fruit developed from a simple ovary and usually having a thin pericarp attached to the seed at only one point (as in the buttercup)
• ache·ni·al əˈkēnēəl adjective