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ob.

abbr.

1. Latin obiit (he died; she died)

2. Latin obiter (incidentally)

abbr.

a. obstetric

b. obstetrics

2. obstetrician

(ŏb, ôb, ôp)

A river, about 3,700 km (2,300 mi) long, of central Russia flowing generally northward to the Gulf of Ob, an arm of the Arctic Ocean.

ob-

pref.

Inverse; inversely: obcordate.

[New Latin, short for obversē, obversely, from Latin obversus, past participle of obvertere, to turn toward : ob-, toward, against (from ob, toward, against, before; see epi in the Appendix of Indo-European roots) + vertere, to turn; see VERSUS.]

Ob.

abbr.
Bible

Obadiah

Indo-European & Semitic Roots Appendices

Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

Indo-European Roots

Semitic Roots

The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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