Oboth

bottles, an encampment of the Israelites during the wanderings in the wilderness (Num. 33:43), the first after the setting up of the brazen serpent.

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Obovate
[ob-oh-veyt] /ɒbˈoʊ veɪt/ adjective 1. inversely ; with the narrow end at the base. /ɒbˈəʊveɪt/ adjective 1. (of a leaf or similar flat part) shaped like the longitudinal section of an egg with the narrower end at the base; inversely ovate
Obovoid
[ob-oh-void] /ɒbˈoʊ vɔɪd/ adjective 1. inversely ; with the narrow end at the base, as certain fruits. /ɒbˈəʊvɔɪd/ adjective 1. (of a fruit or similar solid part) egg-shaped with the narrower end at the base Compare ovoid (sense 2)
Obp
on-base percentage

Obpyriform
[ob-pir-uh-fawrm] /ɒbˈpɪr əˌfɔrm/ adjective 1. inversely pear-shaped; pear-shaped with the narrow end at the base.
Obra
Omnibus Budget Reconciliation Act