What is gymmosperm?

How are the seeds of an angiosperm different than the seeds of a gymmosperm?

Gymnosperms and Angiosperms are both vascular, seed plants.I think the main difference between the two are: gymnosperms seeds are not enclosed in an ovary, whereas angiosperm seeds are inclosed in a ovary (fruit).There are lots of other differences (e.g. mechanisims of fertilisation, mechanisims of seed dispersal.) I suggest looking up the lifecycles of both and comparing the two.