It is a rule of color proportion for the interface palette, where the main color mass of some neutral tint takes 60% of it.

It is a term of responsive web design, that refers to some anchor resolutions, where design and content adapt to perform better user experience. 

Tree testing is a way to evaluate the structure of your website or application, along with card sorting (and is basically a reverse variety of this study) – these two research methods are complementing each other and can provide a better understanding of how the users navigate within your service architecture

Anti-pattern tells commonly spread solutions taken while interacting with the system, which tend to cause fails.

The term describes all types of customer’s feedback about the product or service, including experience of interaction, critiques, expectations and needs.

Ascenders are the vertical strokes directed upwards above the x-height line and sometimes even above the cap-height of capital letters.

Is a control element placed in the top corner of the user interface that visually looks like 3 horizontal lines and from a bird's-eye view looks like a nice burger

Bodystorming is a way of prototyping a product through the idea that the product has already existed, and build up interaction with it accordingly.

Information architecture is a scheme or a document that unites the data about the product structure.

The term defines a person, who is going to interact with the product after its final release, and whom the product is done for.

Thinking Aloud Protocol is a usability study where participants are asked to interact with an interface while continuously thinking out loud, so designers and developers could analyze users’ verbalized thought flow

Baseline is an imaginary line that supports all the letters in your text.

A wireframe is a line graphic plan, guiding UI designers in the interface production.

A representation of metrics, calculations and connections, created to help the user read and interpret all the statistical information

A special tint, used to identify a component error, for example invalid text, the exceeded limit of symbols or uploaded file size, etc.

Clearly market exit provides the easiness of canceling or undoing undesirable operation.