American Heritage® Dictionary of the English Language, Fourth Edition
- adj. Designating color perceived to have zero saturation and therefore no hue, such as neutral grays, white, or black.
- adj. Refracting light without spectral color separation.
- adj. Biology Difficult to stain with standard dyes. Used in reference to cells or tissues.
- adj. Music Having only the diatonic tones of the scale.
Century Dictionary and Cyclopedia
- Destitute of color; free from coloration; transmitting light without decomposing it into its constituent colors: as, an achromatic lens or telescope.
- In biology: Colorless; hyaline. Difficult to stain: a term applied to the portion of the cell-nucleus which exhibits little or no tendency to stain in carmine, hæmatoxylin, or certain aniline dyes used in histologic and cytologic technic.
- adj. optics Free from color; transmitting light without color-related distortion.
- adj. Containing components such as achromatic lenses and prisms, designed to prevent color-related distortion.
- adj. biology Uncolored; not absorbing color from a fluid; -- said of tissue
- adj. music Having only the diatonic notes of the scale; not modified by accidentals.
- adj. Being achromatic in subject
GNU Webster's 1913
- adj. (Opt.) Free from color; transmitting light without decomposing it into its primary colors.
- adj. (Biol.) Uncolored; not absorbing color from a fluid; -- said of tissue.
- adj. having no hue
- Ancient Greek ἀχρωμάτιστος (akhrōmatistos, "uncolored"), from ἀ- (a-, "alpha privative") + χρῶμα (khrōma, "color"); compare French achromatique (Wiktionary)
- From Greek akhrōmatos : a-, without; see a-1 + khrōma, khrōmat-, color. (American Heritage® Dictionary of the English Language, Fourth Edition)
“This might not necessarily be a real appearance for it is conceivable that such traces of colour might be due to the telescopes employed not having been truly achromatic, that is, not sufficiently corrected for colour; but making every allowance for this possible source of mistake there yet remains proof that the colour which has often been seen has been real.”
“In a refracting telescope we have to employ what is known as the achromatic combination, consisting of one lens of flint glass and one of crown glass, adjusted to suit each other with extreme care.”
“Of course the presence of either of these defects is certainly and correctly indicated by the appearance of one or the other of the colors, under certain circumstances; but the simple visibility of prismatic color is by no means a reliable indication of over or under correction of color, and, indeed, to the honor of our opticians, it may be stated that very few objectives are made that cannot justly be called achromatic in the general sense of the term.”
“Although with the increase in power it is correspondingly difficult to combine all these corrections in one objective, they are brought to a high pitch of excellence in the present-day "achromatic" objectives, and so remove the necessity for the use of the higher priced and less durable apochromatic lenses.”
“Her achromatic breasts sway freely inside the full halter and I see her hips dance, suggesting that I do something.”
“Also, belated greetings to achromatic, and Hippo Birdie Dates to Marilee!”
“While designing the achromatic objective lens for a telescope, he saw the spectrum of sunlight as it passed through a thin slit and the dark emission lines.”
“His achromatic objective lens is still used in modern telescopes.”
“A nation's institutional memory is invariably simplistic and achromatic, with good guys in white hats and bad guys in black.”
“Dictionary. com Unabridged (v 1.1) - Cite This Source - Share This a-6 var. of an - 1 before a consonant, meaning “not,” “without”: amoral; atonal; achromatic.”
These user-created lists contain the word ‘achromatic’.
Words I am gathering from my reading
I'm wading through Patrick O'Brian's Aubrey/Maturin novels one by one, and someday, I'll wade through them again and list all the words I learned while reading them.
Edit: I started ma...
Taisha GRE Bible
Hopefully, I'll be using this site for more than one year. It will be fun then to look back and see what new words I found worthy of notice in any given year.
All words spotted in 2008...
Looking for tweets for achromatic.