| osage orange | <botany> An ornamental tree of the genus Maclura (M. Aurantiaca), closely allied to the mulberry (Morus); also, its fruit. The tree was first found in the country of the Osage Indians, and bears a hard and inedible fruit of an orangelike appearance. See Bois d'arc. Source: Websters Dictionary (01 Mar 1998) |
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| osages | <ethnology> A tribe of southern Sioux Indians, now living in the Indian Territory. Source: Websters Dictionary (01 Mar 1998) |
| osar | <geology> See Os. Source: Websters Dictionary (01 Mar 1998) |
| osazone | The compound formed by certain sugars (e.g., glucose, galactose, fructose) with excess hydrazines, possessing two hydrazones on carbons 1 and 2 instead of only one at C-1, as in the ordinary hydrazone; osazone's formed with phenylhydrazine (phenylosazones) are used to characterise and identify certain sugars. Synonym: dihydrazone. (05 Mar 2000) |