Being very important, or key to something.
Having or containing the centre of something.
Being in the centre.
Exerting its action towards the peripheral organs.
centre
Being of good worth, well made, fit for purpose; of high quality.
The third step in OPQRST where the responder investigates what the NOI/MOI feels like.
A newspaper with relatively serious, high-quality content.
Something that differentiates a thing or person.
Level of excellence.
The degree to which a man-made object or system is free from bugs and flaws, as opposed to scope of functions or quantity of items.
In a two-phase liquid–vapor mixture, the ratio of the mass of vapor present to the total mass of the mixture.