Pronunciation: [akɹˈə͡ʊmɪk] (IPA) 
The word "achromic" is spelled with an "a" at the beginning followed by "chromic," indicating its lack of color. The pronunciation of "achromic" is (əˈkrōmik), with the first syllable pronounced as a schwa (ə) and the stress on the second syllable. The "ch" sound is pronounced as a "k" sound, and "i" is short, making the "o" sound long. The final "ic" is pronounced with a slight emphasis, completing the word.
Achromic is an adjective derived from the word "achromatic," which consists of the two Greek roots "a-" meaning "without" or "not," and "chroma" meaning "color." Achromic describes something that is devoid of color or does not exhibit any hues, tones, or shades. It refers to objects, substances, or surfaces that lack pigment or any discernible chromatic qualities. Achromic can be used to describe both natural and artificial entities.
In the realm of visual perception, achromic objects or images appear colorless, being limited to a grayscale spectrum. This absence of color can be a result of external factors like lacking pigmentation, such as in white or colorless flowers, or due to light and reflection properties like those occurring in grayscale paintings or photographs. Furthermore, achromic conditions can also relate to physiological defects, such as congenital or acquired color blindness, where individuals fail to perceive colors in the conventional manner.
Achromic is a term used in various domains, including art, biology, chemistry, and physics, where the absence of color or pigmentation plays a significant role in classification, analysis, and interpretation. Understanding the concept of achromic is crucial in differentiating between objects that possess color and those that do not, leading to a deeper comprehension of their attributes and characteristics.
Colorless.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word achromic is derived from the Greek word achromos, which is a combination of the prefix a- meaning not or without, and chroma meaning color. When combined, they form achromos, meaning without color.
