What does accreting mean?
"Accreting" is the present participle of "accrete," meaning to grow or enlarge gradually through the steady addition of small amounts of matter or other material. The word is most at home in scientific contexts, above all astrophysics: stars, planets, and black holes are said to be accreting when they gather gas, dust, or debris from their surroundings. A protoplanet, for instance, becomes a planet by accreting countless particles within its orbital neighbourhood. By extension, accreting can describe any slow, cumulative increase — wealth, influence, sediment, or debt — though outside technical writing it carries a distinctly formal tone. It comes from the Latin verb accrescere, meaning to grow or increase, formed from ad- ('toward') and crescere ('to grow'). Its noun counterpart, accretion, is widely used both in geology and finance, making this family of words a useful part of an educated vocabulary for describing anything built bit by bit.
verb (present participle of accrete)Growing or increasing gradually by the addition of successive layers, particles, or parts; in astronomy, describing a body that accumulates matter from surrounding material.
- To grow larger through the gradual addition of layers, particles, or accumulated material (used especially of celestial bodies gathering matter).
- To increase or build up gradually over time, as with wealth, power, or influence.
"The young star sat at the centre of a disc of gas, accreting dust and debris as it grew."
"Over millions of years, the protoplanet kept accreting material until it reached its present size."
"Her reputation had been accreting steadily for decades, layer upon layer."
The word behind how planets are born: worlds aren't built all at once — they're accreting, one grain of cosmic dust at a time.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of accreting
"Accreting" derives ultimately from the Latin verb accrescere, 'to grow, to increase', composed of the prefix ad- ('toward') plus crescere ('to grow'), the same root that gives us 'crescent' and 'increase'. English adopted the verb accrete in the early 17th century, borrowing directly from the Latin past participle accretus. Its sibling noun, accretion, entered English slightly earlier via legal and medical Latin before acquiring its modern geological and astronomical senses. Cognate forms appear across Romance languages, such as French accrétion and Spanish acreción.
Related word forms
How accreting is actually used
Formal register, common chiefly in scientific writing — particularly astrophysics, where 'accreting' describes stars, black holes, and protoplanets gathering matter. Outside science it tends to sound technical; simpler verbs such as 'growing' or 'accumulating' are preferred in everyday speech.
Easily confused with accreting
Excreting means discharging waste from the body, while accreting means growing by gradual accumulation.
A secretion is a substance produced and released by cells or glands, whereas accretion is matter added to a body over time.