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Glite Dictionary
valveless

valveless

7.5
Having no part that controls the flow of liquid or air
  • adjective
  • /ˈvælv.ləs/
  • Specialized
translation icon : sin válvulas
  • The engineer designed a valveless engine that operates smoothly without traditional valves.

Examples

  • A unique feature of the valveless instrument is its ability to produce sound without any moving parts.

  • They can also spread indirectly through the valveless veins of the sinuses and orbit as a result of a thrombophlebitic or embolic condition.

    Academic text (2002)

  • A natural (valveless) trumpet has two-thirds of its length in the form of a cylindrical tube, whereas a bugle has a conical shape throughout and has its basis in the hunting horn, not in the military trumpet.

    Academic text (2015)

  • The study focused on the valveless circulatory system of certain marine organisms, highlighting their efficient blood flow.

Antonyms

valved
  • Specialized
5.3

Having a device that opens and closes to control the flow of gas or liquid

How Valved

valved
  • Specialized
5.3
valveless
  • Specialized
7.5

Surface Forms

valveless positive

Morphology

valveless = valve (transparent) = valve + less

Formed by the productive English suffix '-less' meaning 'without', so the meaning 'without valves' is directly deducible.

Etymology

Valveless comes from valve, a part that 'opens and closes', like the valve on a tap, and the ending -less, which means 'without'. So, valveless means 'without' a valve, which is why a valveless heart or pump cannot control flow.