achene
achene \*-'ke-n\ \*-'ke--ne--*l\ n [NL achaenium, fr. a- + Gk chainein to yawn - more at YA]WN : a small dry indehiscent one-seeded fruit developing from a simple ovary and usu. having a thin pericarp attached to the seed at only one point - ache.ni.al aj