| ootid | The nearly mature ovum after the first meiotic division has been completed and the second initiated; in most higher mammals, the second meiotic division is not completed unless fertilization occurs. Origin: G. Ootidion, a diminutive egg. See -id (05 Mar 2000) |
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| ootocoid | <zoology> A half oviparous, or an oviparous, mammal; a marsupial or monotreme. Origin: Gr. Laying eggs (egg + a bearing, to bear). Source: Websters Dictionary (01 Mar 1998) |
| ootype | <zoology> The part of the oviduct of certain trematode worms in which the ova are completed and furnished with a shell. Source: Websters Dictionary (01 Mar 1998) |
| ooze | 1. Soft mud or slime; earth so wet as to flow gently, or easily yield to pressure. "My son i' the ooze is bedded." 2. Soft flow; spring. 3. The liquor of a tan vat. Origin: OE. Wose, AS. Wase dirt, mire, mud, akin to ws juice, ooze, Icel. Vas wetness, OHG. Waso turf, sod, G. Wasen. Source: Websters Dictionary (01 Mar 1998) |
| oozoa | <zoology> Same as Acrita. Origin: NL, fr. Gr. An egg + an animal. Source: Websters Dictionary (01 Mar 1998) |