OlfactionaryPerfumery Glossary
39 key terms used across Olfactionary Academy, defined plainly and linked back to the chapter that actually covers each one in depth. Not exhaustive, this covers the terms a newcomer hits most often, not every technical word on the site.
A highly concentrated aromatic extract obtained by solvent extraction, typically from delicate flowers (jasmine, tuberose) that can't survive steam distillation intact.
Ch. 14 →A specific combination of materials, in specific proportions, that stops smelling like its individual parts and reads as one new, unified impression.
Ch. 24 →A reactive chemical functional group responsible for the sparkling, soapy-metallic quality in fragrances like Chanel No. 5, not a single material but a whole class of them.
Ch. 16 →A material required to be declared on packaging in many markets because of documented, real skin-sensitization risk in some users.
Ch. 19 →The slowest-evaporating layer of a fragrance's pyramid, the part that lasts longest on skin, usually woods, resins, musks, or amber materials.
Ch. 3 →The chemistry and process work, testing, blending adjustments, reference standards, that keeps every production run of a perfume smelling the same as the last.
Ch. 55 →A thin, absorbent paper strip dipped in a fragrance or raw material and smelled directly, rather than applying it to skin, the standard evaluation tool.
Ch. 31 →An aroma chemical a fragrance house develops and keeps exclusive to its own client formulas, rather than selling to competitors.
Ch. 17 →A fragrance family built on a classic bergamot–labdanum–oakmoss (or its modern IFRA-compliant substitute) skeleton, named after Coty's 1917 Chypre.
Ch. 23 →How a limited set of odorant receptors, activated in different combinations, lets the brain distinguish many thousands of distinct smells from relatively few receptor types.
Ch. 1 →The percentage of aromatic compound diluted in a fragrance's alcohol base, the real driver of price, strength, and longevity differences between tiers of the same perfume.
Ch. 37 →The waxy, solvent-extracted intermediate material that an absolute (see above) is further refined from.
Ch. 14 →The final stage of a fragrance's evolution on skin, once the top and heart notes have faded and the base notes dominate what's left.
Ch. 18 →A historic cold-fat extraction method for flowers too delicate to survive distillation, the flower's scent is absorbed directly into purified fat, then washed out with alcohol.
Ch. 14 →A material, usually a base note, that slows the evaporation of more volatile materials around it, helping a fragrance last longer overall.
Ch. 30 →A follow-up fragrance released under an already-famous name (e.g. a new 'Light Blue'), sharing branding and often a family resemblance, but a genuinely different formula.
Ch. 39 →A fragrance family built on a lavender–coumarin–oakmoss 'barbershop' skeleton, named after Houbigant's 1882 Fougère Royale.
Ch. 23 →Scent engineered for a product, detergent, candle, air freshener, rather than to be worn as a perfume in its own right, with its own distinct performance requirements.
Ch. 42 →Gas chromatography–mass spectrometry: the real lab technique used to separate and identify a fragrance's individual chemical components, including in headspace analysis.
Ch. 31 →A fragrance family built on edible-smelling notes, vanilla, caramel, chocolate, praline, a genuinely modern category with no real 19th-century precedent.
Ch. 21 →Capturing the actual volatile compounds a living, uncut plant releases into the air around it, often meaningfully different from what distilling or extracting the cut plant yields.
Historic Texts →The layer of a fragrance that emerges as the top notes fade, usually florals or spices, and often what a perfume is 'about' once it settles in.
Ch. 3 →The International Fragrance Association, the industry's own voluntary safety body, publishing concentration limits and restrictions for individual fragrance materials.
Prohibited materials →A single aroma chemical separated out from a natural essential oil, for instance, citral isolated from lemongrass oil, rather than a fully synthetic invention.
Ch. 17 →Letting a finished fragrance compound rest and blend, sometimes for weeks, before it's bottled, real time the formula needs to fully integrate.
Ch. 30 →A synthetic molecule that is chemically identical to one which also occurs in nature, as opposed to a wholly novel synthetic with no natural counterpart.
Ch. 17 →A broad scent category (floral, woody, oriental/amber, chypre, fougère, and more) used to classify and compare fragrances, several competing classification systems exist.
Ch. 21 →A warm fragrance family built on resins, vanilla, and amber-type bases, one of the oldest structural families in Western perfumery.
Ch. 23 →The wall or desk of hundreds of labeled raw materials a perfumer works directly from while composing, named for its resemblance to a pipe organ's keyboard.
Ch. 27 →Describes a material, unrefined cold-pressed bergamot oil is the classic example, that reacts with UV light on skin to cause burns or discoloration.
Ch. 19 →The unusually strong, involuntary link between smell and long-term emotional memory, named after the scene in Proust's In Search of Lost Time.
Ch. 2 →Changing an existing fragrance's formula, usually to comply with new safety regulation as materials are restricted, not (as commonly assumed) to cut costs.
Ch. 11 →A substance capable of triggering an allergic skin reaction, typically with repeated exposure, the scientific basis behind most IFRA restrictions.
Ch. 19 →A trained group of human testers used to formally evaluate a fragrance's character and performance before it ships commercially.
Ch. 58 →French for 'wake', how far, and how noticeably, a fragrance projects into the air off the wearer's skin, distinct from how long it lasts.
Ch. 37 →How long a material's scent physically persists on skin or fabric, the real property behind loose talk about a perfume's 'longevity.'
Ch. 18 →The commercial document a brand hands a fragrance house, describing what a new perfume needs to achieve in the market, not a chemical spec.
Ch. 28 →A material dissolved and extracted in alcohol, historically the standard method for animalic materials like musk, civet, and ambergris, as real 1892 formulas in this site's Formula Index show.
Ch. 14 →The fastest-evaporating layer of a fragrance's pyramid, smelled first, and usually gone within the first 15–30 minutes.
Ch. 3 →