26 July 2015
achromatic
[ak-ruh-mat-ik, ey-kruh-]
adjective
1. Optics.
free from color.
able to emit, transmit, or receive light without separating it into colors.
2. Biology. (of a cell structure) difficult to stain.
3. Music. without accidentals or changes in key.
Origin of achromatic
1760-1770; a-6+ chromatic
Related forms
achromatically, adverb
Dictionary.com
Examples from the Web for achromatic
Historical Examples
achromatic lenses are used in all high-grade optical instruments such as telescopes and microscopes.
(Physics, Willis Eugene Tower)
If not, the substitution of an achromatic lens will be of no advantage.
(Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4, Various)
The achromatic condenser itself should consist of at least two combinations of different powers and of wide angular apertures.
(Photography in the Studio and in the Field, Edward M. Estabrooke)
Anagram
archaic Tom
mac chariot
a trim coach
Today’s quote
It is enough that the people know there was an election. The people who cast the votes decide nothing. The people who count the votes decide everything.
– Joseph Stalin
On this day
26 July 1875 – birth of Carl Jung, Swiss psychiatrist and founder of analytical psychology. He developed the concepts of extraversion and introversion; archetypes and collective unconscious. Died 6 June 1961.
26 July 1894 – birth of Aldous Huxley, English writer. Most famous for his vision of the future, ‘Brave New World’, as well as his work ‘The Doors of Perception’, based on his use of psychedelic drugs. Jim Morrison named his 60’s psychedelic rock band, ‘The Doors’ after Huxley’s book. Died 22 November 1963.
26 July 1943 – birth of Mick Jagger. English singer-songwriter, founding member of the Rolling Stones.
26 July 1945 – Potsdam Declaration, or ‘Proclamation Defining Terms for Japanese Surrender’ is issued by President Harry S. Truman (U.S.), Prime Minister Winston Churchill (U.K.) and Chairman Chiang Kai-shek (China). The document stated that Japan faced ‘prompt and utter destruction’ if it did not surrender. Japan initially rejected the declaration, resulting in President Truman ordering the atomic bombings of Hiroshima and Nagasaki on 6 and 9 August 1945, respectively.
26 July 1952 – death of Eva Perón, first lady of Argentina and second wife of Argentine President, Juan Perón. Her life was immortalised in the Andrew Lloyd Webber musical, Evita, which included the hit song, ‘Don’t cry for me Argentina’.
26 July 1953 – Fidel Castro forms the revolutionary organisation, Movimiento 26 de Julio, (‘26th of July Movement‘), or M-26-7, fighting against Cuba’s Batista regime. M-26-7 fails in its attack on Moncado Barracks on 26 July 1953, but eventually succeeds in overthrowing Batista in 1959.