9. Botany . a whitish powdery deposit or coating, as on the surface of certain fruits and leaves: the bloom of the grape.
13. Also called algal bloom, water bloom. the sudden development of conspicuous masses of organisms, as algae, on the surface of a body of water.
17. to be in or achieve a state of healthful beauty and vigour: a sickly child who suddenly bloomed; a small talent that somehow bloomed into major artistry.
1. a piece of steel, square or slightly oblong in section, reduced from an ingot to dimensions suitable for further rolling.
2. a large lump of iron and slag, of pasty consistency when hot, produced in a puddling furnace or bloomery and hammered into wrought iron.