Vocabulary : Oryctognosy to Osage orange

Oryctognosy : Mineralogy.
Oryctography : Description of fossils.
Oryctological : Of or pertaining to oryctology.
Oryctologist : One versed in oryctology.
Oryctology : An old name for paleontology. ;; An old name for mineralogy and geology.

Oryx : A genus of African antelopes which includes the gemsbok, the leucoryx, the bisa antelope (O. beisa), and the beatrix antelope (O. beatrix) of Arabia.
Oryza : A genus of grasses including the rice plant; rice.
Os : A bone. ;; A mouth; an opening; an entrance. ;; One of the ridges of sand or gravel found in Sweden, etc., supposed by some to be of marine origin, but probably formed by subglacial waters. The osar are similar to the kames of Scotland and the eschars of Ireland. See Eschar.
O's : of O
Osage orange : 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.

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