oo-

¹ American  

1. a combining form meaning “egg,” used in the formation of compound words.

   oogamous.

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o'o ² American  

[oh-oh] / ˈoʊ oʊ /

Or 'ō'ō

noun

plural

o’os

1. any of several species of Hawaiian birds of the extinct genus Moho, especially the extinct M. nobilis (Hawaiian o'o ), which had black plumage and two tufts of yellow plumes used to make ceremonial robes for the Hawaiian kings. The last surviving species was M. braccatus (Kauai o'o ), classified as extinct in 1987.

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oo- British  

combining form

1. egg or ovum

   oosperm

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Usage

What does oo- mean? Oo- is a combining form used like a prefix meaning “egg.” It is used in many scientific terms, especially in biology.Oo- comes from the Greek ōión, meaning “egg.” The Greek ōión helps form the word ōophóros, meaning “egg-bearing” and is the source of the combining form oophoro-, used to indicate the ovary.Distantly related to the Greek ōión is the Latin word for egg, ōvum, source of the related combining forms ov-, ovi-, and ovo-, also used to mean “egg.” The Latin ōvum is ultimately the origin of ovario-, used, like oophoro-, to mean “ovary.”What are variants of oo-?When combined with words or word elements that begin with a vowel, oo- becomes o-, as in oidium.

Etymology

Origin of oo-¹

< Greek ōio-, combining form of ōión egg ¹

Origin of o'o²

First recorded in 1885–90; from Hawaiian ʿōʿō

Example Sentences

C/OO "Val!" called Jonn, stumbling back toward the hole in the web.

From Literature

Min Zaw Oo adds that the military has also been "experimenting with gyrocopters, which can reach further targets with heavier payloads and more advanced onboard systems".

From BBC

They called him Dock Rigg — the surname of his employer — but government papers say his name was Oo Dock.

From Los Angeles Times

Among the many loved ones Soe Nay Oo lost was one of his wife's cousins.

From BBC

Sagaing city's Muslim community has had to move the bodies of their dead to Mandalay, crossing the Irrawaddy River using the sole bridge connecting the two cities, according to Soe Nay Oo.

From BBC