Ultherapy is the only FDA-approved non-invasive device that uses micro-focused ultrasound to lift skin on the face and neck. It uses ultrasound energy to lift, tone, and tighten loose skin on the brow, face, neck, and under the chin.
Color words in a language can also be divided into abstract color words and descriptive color words, though the distinction is blurry in many cases. Abstract color words are words that only refer to a color. In English white, black, red, yellow, green, blue, brown, and gray are abstract color words.
Additive Colors. Colors whose beams of light in various combinations can produce any of the color sensations are called primary, or spectral, colors. The process of combining these colors is said to be additive; i.e., the sensations produced by different wavelengths of light are added together.