释义 |
involution /ɪnvəˈl(j)uːʃ(ə)n /noun1 [mass noun] Physiology The shrinkage of an organ in old age or when inactive, e.g. of the womb after childbirth.Routine sections revealed normal thymic tissue with fatty involution and no evidence of tumor....- As gastrulation proceeds, the region of involution spreads laterally and vegetally so that involution involves the vegetal endoderm and so forms a circle around a plug of yolky cells.
- Gradual involution of the Bartholin's glands can occur by the time a woman reaches 30 years of age.
2 Mathematics A function, transformation, or operator that is equal to its inverse, i.e. which gives the identity when applied to itself.In his text Traité de géométrie in 1852 Chasles discusses cross ratio, pencils and involutions, all notions which he introduced....- The book also treats von Staudt's theory of complex elements as defined by real involutions.
- The manner of their joining reflects the involutions of a Mobius strip.
3 [mass noun] formal The process of complicating something, or the state of being complicated: periods of artistic involution...- Urban annotation thus becomes a process of involution, an intensive rather than an extensive phenomenon: a potential anti-sprawl.
- And like, a dear friend of mine, a lawyer had said, ‘that we should be involved in the process of evolution and not in the process of involution.’
- In other words, it is a process of involution with Puram Shiva getting involved increasing with each step and descending to the stage where it look as physical.
Derivativesinvolutional /ˌɪnvəˈl(j)uːʃ(ə)n(ə)l / adjective ...- This technique allows for the possibility of improving breast aesthetics in women with involutional (ie, decrease in size of the breasts) changes after childbirth or menopause.
- The more abundant cellular infiltrate in the tumors from the 2 older groups might reflect an involutional process comparable to the involutional changes of the breast parenchyma in postpartum and menopausal women.
- A PET Scan showed globally decreased radiotracer uptake within the brain, bilaterally, consistent with involutional change and prior radiation therapy.
OriginLate Middle English (in the sense ( 'part) curling inwards'): from Latin involutio(n-), from involvere (see involve). |