| oophorostomy | Synonym: ovariostomy. Origin: oophoro-+ G. Stoma, mouth. (05 Mar 2000) |
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| oophorotomy | Synonym: ovariotomy. Origin: oophoro-+ G. Tome, incision (05 Mar 2000) |
| oophorrhagia | Ovarian haemorrhage. Origin: oophoro-+ G. Rhegnymi, to burst forth (05 Mar 2000) |
| oophyte | <botany> Any plant of a proposed class or grand division (collectively termed oophytes or Oophyta), which have their sexual reproduction accomplished by motile antherozoids acting on oospheres, either while included in their oogonia or after exclusion. This class was at first called Oosporeae, and is made to include all algae and fungi which have this kind of reproduction, however they may differ in all other respects, the contrasted classes of Thallophytes being Protophytes, Zygophytes, and Carpophytes. The whole system has its earnest advocates, but is rejected by many botanists. See Carpophyte. Source: Websters Dictionary (01 Mar 1998) |
| oophytic | <botany> Of or pertaining to an oophyte. Source: Websters Dictionary (01 Mar 1998) |
| ooplasm | Protoplasmic portion of the ovum. Origin: G. Oon, egg, + plasma, a thing formed (05 Mar 2000) |
| oorial | <zoology> A wild, bearded sheep inhabiting the Ladakh mountains. It is reddish brown, with a dark beard from the chin to the chest. Source: Websters Dictionary (01 Mar 1998) |
| oosome | A cytoplasmic body in the ovum that passes into the germ cell. Origin: G. Oon, egg + soma, body (05 Mar 2000) |
| oospere | 1. <botany> An unfertilized, rounded mass of protoplasm, produced in an oogonium. After being fertilized by the access of antherozoids it becomes covered with a cell wall and develops into an oospore, which may grow into a new plant like the parent. 2. <botany> An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle. Source: Websters Dictionary (01 Mar 1998) |
| oosperm | <biology> The ovum, after fusion with the spermatozoon in impregnation. Source: Websters Dictionary (01 Mar 1998) |
| oosporangium | Origin: NL, fr. Gr. An egg + vessel. <botany> An oogonium; also, a case containing oval or rounded spores of some other kind than oospores. Source: Websters Dictionary (01 Mar 1998) |
| oospore | <botany> A special kind of spore resulting from the fertilization of an oosphere by antherozoids. A fertilized oosphere in the ovule of a flowering plant. Source: Websters Dictionary (01 Mar 1998) |
| oosporic | <botany> Of or pertaining to an oospore. Source: Websters Dictionary (01 Mar 1998) |
| oostegite | <zoology> One of the plates which in some Crustacea inclose a cavity wherein the eggs are hatched. Source: Websters Dictionary (01 Mar 1998) |
| ootheca | <marine biology> An egg case, especially those of many kinds of mollusks, and of some insects, as the cockroach. Cf. Ooecium. Origin: NL, fr. Gr. An egg + a case. (19 Mar 1998) |