| blastoidea | <zoology> One of the divisions of Crinoidea found fossil in paleozoic rocks; pentremites. They are so named on account of their budlike form. Origin: NL, fr. Gr. Sprout. Source: Websters Dictionary (01 Mar 1998) |
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| blastolysis | Dissolution or destruction of the blastocyst or blast cells and subsequent death. Origin: blasto-+ G. Lysis, loosening (05 Mar 2000) |
| blastolytic | Relating to blastolysis. (05 Mar 2000) |
| blastoma | <tumour> A neoplasm composed chiefly or entirely of immature undifferentiated cells (i.e., blast forms), with little or virtually no stroma. Synonym: blastocytoma, embryonal carcinosarcoma. Origin: blasto-+ G. -oma, tumour (05 Mar 2000) |
| blastomere | One of the cells produced as the result of cell division, cleavage, in the fertilized egg. (18 Nov 1997) |
| blastomeres | The undifferentiated cells formed by cleavage of the fertilised ovum. This includes cells in the cleavage, morula, and blastula stages of the embryo. (12 Dec 1998) |
| blastomerotomy | Synonym: blastotomy. Origin: blastomere + G. Tome, incision (05 Mar 2000) |
| blastomogenic | Causing or producing a blastoma. (05 Mar 2000) |
| blastomyces | A deuteromycetous fungal genus, a species of which, blastomyces dermatitidis, causes blastomycosis. (12 Dec 1998) |
| Blastomyces dermatitidis | A dimorphic soil fungus that causes blastomycosis. It grows in mammalian tissues as budding cells and in culture as a white to buff-coloured filamentous fungus bearing spherical or ovoid conidia on terminal or lateral short, slender conidiophores. In its perfect (teleomorph) state it is known as Ajellomyces dermatitidis. Origin: blasto-+ G. Mykes, fungus (05 Mar 2000) |
| blastomycetic dermatitis | A cutaneous form of blastomycosis. (05 Mar 2000) |
| blastomycin | An antigen for intradermal testing prepared from sterile filtrates of cultures of the filamentous form of Blastomyces dermatitidis. (05 Mar 2000) |
| blastomycosis | A fungal infection caused by Blastomyces dermatitidis. This rare fungal infection may produce inflammatory lesion of the skin or lungs or present as a disseminated disease to the skin, lungs, bones, liver, spleen and central nervous system. Uncommon unless patient is immunocompromised (AIDS). (27 Sep 1997) |
| blastoneuropore | A temporary opening formed in some embryos by the union of the blastopore and neuropore. Origin: blasto-+ neuropore (05 Mar 2000) |
| blastophore | <biology> That portion of the spermatospore which is not converted into spermatoblasts, but carries them. Origin: Gr. Sprout + to bear. Source: Websters Dictionary (01 Mar 1998) |