(In Gramineae/Poaceae) used for groups of three spikelets in Zonotriche;
(In palms) a group of three florets, the central female, the flanking ones male;
(In Amaranthaceae) a cluster of three flowers, a fertile one flanked by two sterile ones.
Three organs or three symptoms which are linked together in a group.
Set of three similar things considered as a unit.
A group of three united or closely associated structures or three symptoms or effects that occur together. A portal triad in a portal canal of the liver consists of a branch of the portal vein, a branch of the hepatic artery, and an interlobular bile tubule.