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OS US English

(In calculating dates) Old Style

old style US English

The method of calculating dates using the Julian calendar

OS in Old Style US English

The method of calculating dates using the Julian calendar

os1 US English

A bone (used chiefly in Latin names of individual bones, e.g., os trapezium)

os2 US English

An opening or entrance to a passage, especially one at either end of the cervix of the uterus

Os US English

The chemical element osmium

Os in O1 US English

The fifteenth letter of the alphabet

O1 US English

The fifteenth letter of the alphabet

osmium US English

The chemical element of atomic number 76, a hard, dense silvery-white metal of the transition series

Os in osmium US English

The chemical element of atomic number 76, a hard, dense silvery-white metal of the transition series

o.s. US English

(In prescriptions) the left eye

os penis US English

A bone in the penis of carnivores and some other mammals

O's in O1 US English

The fifteenth letter of the alphabet

Trás-os-Montes US English

A mountainous region of NE Portugal, north of the Douro River

o-os in o-o US English

A honeyeater (bird) found in Hawaii, now probably extinct, which had a thin curved bill and climbed about on tree trunks

os trapezium in trapezium US English

A bone in the wrist below the base of the thumb