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Unknown Soldier, Tomb of the

(Encyclopedia)Unknown Soldier, Tomb of the, form of memorial to a nation's war dead, adopted by many countries after World War I. The Tomb of the Unknowns, a memorial to the American dead of World Wars I and II, th...

accordion

(Encyclopedia)CE5 Accordion accordion, musical instrument consisting of a rectangular bellows expanded and contracted between the hands. Buttons or keys operated by the player open valves, allowing air to enter...

parsec

(Encyclopedia)parsec pärˈsĕc [key] [parallax + second], in astronomy, basic unit of length for measuring interstellar and intergalactic distances, equal to 206,265 times the distance from the earth to the su...

sinus

(Encyclopedia)CE5 Sinuses of the face sinus, cavity or hollow space in the body, usually filled with air or blood. In humans the paranasal sinuses, mucus-lined cavities in the bones of the face, are connected b...

Arrokoth

(Encyclopedia)Arrokoth, trans-Neptunian object in the Kuiper Belt (see comet). First observed by the Hubble Space Telescope in 2014 and later nicknamed Ultima Thule (until its official naming in late 2019), it beca...

Martin, Glenn Luther

(Encyclopedia)Martin, Glenn Luther, 1886–1955, American aviation pioneer, b. Macksburg, Iowa. Martin built his first airplane in 1909, and in 1912 set the world over-water record, flying from mainland California ...

guinea fowl

(Encyclopedia)guinea fowl gĭnˈē [key], common name for any of the seven species of gallinaceous birds of the family Numididae, native to Africa and Madagascar. The helmeted guinea fowl, Numida meleagris, from wh...

Searle, Ronald William Fordham

(Encyclopedia)Searle, Ronald William Fordham, 1920–2011, British cartoonist, b. Cambridge. He joined the army as World War II broke out, was captured (1942) by the Japanese at Singapore, and was in the forced lab...

pelican

(Encyclopedia)pelican, common name for a large, gregarious aquatic bird of warm regions, allied to the cormorants and gannets. Pelicans are heavy-bodied, long-necked birds with large, flat bills. They are graceful ...

Saroyan, William

(Encyclopedia)Saroyan, William səroiˈən [key], 1908–81, American author, b. Fresno, Calif. Of Armenian background and extremely prolific, he created works that combine optimism, sentimentality, and a rhapsodic...