Latin accommodatus, past participle of accommodare, from ad- + commodare to make fit, from commodus suitable
- Date: 1550
- transitive verb
- 1 : to make fit, suitable, or congruous
- 2 : to bring into agreement or concord : reconcile
- 3 : to provide with something desired, needed, or suited (as a helpful service, a loan, or lodgings)
- 4 a : to make room for
- b : to hold without crowding or inconvenience
- intransitive verb :
- to adapt oneself; also : to undergo visual accommodation
Most commonly, accommodation (in British usage) or accommodations (in American usage) refers to lodging in a dwelling or similar living quarters afforded to travelers in hotels or on cruise ships, or prisoners, etc.
Accommodation acts like a reflex, but can also be consciously controlled. Mammals, birds and reptiles vary the optical power by changing the form of the elastic lens using the ciliary body (in humans up to 15 diopters). Fish and amphibians vary the power by changing the distance between a rigid lens and the retina with muscles.