Biology

• Bloom, one or more flowers on a flowering plant
• Algal bloom, a rapid increase or accumulation in the population of algae in an aquatic system
• Jellyfish bloom, a collective noun for a large group of jellyfish
• Epicuticular wax bloom, a whitish haze due to small crystals of wax, occurring on the surface of many fruits
• Bloom syndrome, an autosomal recessive human genetic disorder that predisposes the patient to a wide variety of cancer

Computing

• Bloom filter, a probabilistic method to find a subset of a given set
• Bloom (shader effect), a graphics effect used in modern 3D computer games
• Bloom (software), a generative music application for the iPhone and iPod Touch
• BLOOM (language model), an open-source large language model

Art conservation

• Wax bloom, an efflorescence of wax or stearic acid affecting oil pastels
• Saponification in art conservation, a chalky white efflorescence on old oil paintings
• Bloom, pigment migration from wetter to drier surfaces of a watercolor painting

Other science and technology

• Bloom (bloomery) (sponge iron), a porous mass of iron and slag produced in a bloomery
• Bloom (casting), a semi-finished metal casting
• Bloom (sulfur), the migration of sulfur to the exterior of a rubber
• Bloom (test), a test to measure the strength of a gel or gelatin
• Blooming (CCD), an effect that happens when a pixel in a CCD image sensor is overloaded
• Blooming (directed-energy weapon), an effect of laser beams and particle beams in the air
• Chocolate bloom, the appearance of white coating on chocolate
• Thermal blooming, an atmospheric effect on high-energy laser beams

United States

• Bloom, Colorado, a ghost town
• Bloom, Kansas, an unincorporated community
• Bloom, Wisconsin, a town
• Bloom City, Wisconsin, an unincorporated community
• Blooming, Oregon, an unincorporated community
• Bloom Creek (disambiguation)
• Bloom's Lake, a lake in Minnesota
• Bloom Township (disambiguation)

Music