The Collaborative International Dictionary
Saccate \Sac"cate\, a. [NL. saccatus, fr. L. saccus a sack, bag.]
(Biol.) Having the form of a sack or pouch; furnished with a sack or pouch, as a petal.
(Zo["o]l.) Of or pertaining to the Saccata, a suborder of ctenophores having two pouches into which the long tentacles can be retracted.
a. 1 Shaped like a pouch or sac. 2 Having a pouch or sac. 3 Enclosed in a sac. 4 (context botany English) Of a pollen grain that has one or more saccus.
Saccate is a term used in botany to describe plant parts that are shaped like a pouch or sack. Sometimes, when all members of a taxon share a property of having some part being saccate, this is referred to in the name of the taxon, such as the algae family Phaeosaccionaceae.