What does efflorescence mean?
Efflorescence is a noun with two principal strands of meaning. Literally, it denotes the act or period of flowering — the blossoming of a plant. Figuratively, it describes any vigorous flourishing or burst of development: writers speak of an efflorescence of creativity, of cultural efflorescence, or of an era's artistic efflorescence, always with connotations of vitality, abundance, and beauty at their peak. The word also has a technical life in chemistry and building science, where it names the whitish, powdery deposit of soluble salts that appears on masonry, concrete, or brick as moisture evaporates from the surface — a telltale sign of dampness. Derived from Latin roots meaning 'to bloom out,' efflorescence carries an elegant, formal register suited to scholarly prose and critical essays. Whether describing a garden at its height, a civilization's golden age, or a stain creeping up a cellar wall, it captures the image of something emerging fully into view.
The state or period of flowering; figuratively, a flourishing or rapid development.
"The efflorescence of Greek philosophy in the fifth century BCE shaped Western thought."
Formal register; frequent in historical and literary criticism.
In chemistry and building science, a powdery deposit of salts formed on a surface by evaporation of moisture-bearing solutions; also, the loss of water of crystallization from a hydrated salt to yield a powder.
"Builders traced the efflorescence on the bricks to rising damp in the foundation."
Regular plural, used mainly in technical contexts when referring to multiple deposits of salt or multiple instances of blooming.
"Several white efflorescences marked the dampest corners of the old warehouse."
The same word that describes a garden in full bloom also names the chalky white stains creeping up damp brick walls — poetry and plumbing share a root.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of efflorescence
Efflorescence derives from the Latin verb efflorescere, meaning 'to bloom' or 'to blossom forth', formed from ex- ('out') plus florescere ('to begin to flower'), a frequentative of florere ('to flower'), itself from flos ('flower'). It entered English in the early 17th century, initially in botanical senses before extending to figurative and chemical uses. It shares its root with words such as flourish, floral, and florescence, all tracing back to the Latin flos.
Related word forms
How efflorescence is actually used
Efflorescence is a formal, literary word in its flowering/flourishing senses, common in academic and critical writing. In architecture, engineering, and construction it is a precise technical term for salt staining on masonry. The plural is efflorescences.
Easily confused with efflorescence
Fluorescence is the emission of light by a substance absorbing radiation, whereas efflorescence refers to flowering, flourishing, or salt deposits on surfaces.