| archform | <dentistry> The shape of the dental arch such as a horseshoe archform or a v-shaped archform, or of an orthodontic wire formed to the shape of that arch. (08 Jan 1998) |
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| archiannelida | <zoology> A group of Annelida remarkable for having no external segments or distinct ventral nerve ganglions. Origin: NL.; pref. Archi- + annelida. Source: Websters Dictionary (01 Mar 1998) |
| archiater | Chief physician; a term applied, on the continent of Europe, to the first or body physician of princes and to the first physician of some cities. Origin: L. Archiatrus, Gr.; pref. + physician, to heal. Source: Websters Dictionary (01 Mar 1998) |
| archiblastula | <biology> A hollow blastula, supposed to be the primitive form; a cloblastula. Origin: Pref. Archi + blastula. Source: Websters Dictionary (01 Mar 1998) |
| archicerebellum | The small, phylogenetically oldest portion of the cerebellum, also called vestibulocerebellum because its afferents arise from the vestibular ganglion and nuclei; in mammals, it is represented by four subdivisions of the cerebellum: nodulus, uvula vermis, flocculus, and lingula of cerebellum. Synonym: archaeocerebellum. Origin: archi-+ L. Cerebellum (05 Mar 2000) |
| archicortex | 1. Typically, the phylogenetically older parts of the cerebral cortex. 2. More specifically, the cortex forming the hippocampus. See: allocortex, cerebral cortex. Synonym: archipallium. Origin: archi-+ L. Cortex (05 Mar 2000) |
| archidiaconal | Of or pertaining to an archdeacon. "This offense is liable to be censured in an archidiaconal visitation." (Johnson) Origin: L. Archidiaconus, Gr, equiv. To E. Archdeacon. Source: Websters Dictionary (01 Mar 1998) |
| archil | 1. A violet dye obtained from several species of lichen (Roccella tinctoria, etc), which grow on maritime rocks in the Canary and Cape Verd Islands, etc. 2. The plant from which the dye is obtained. Alternative forms: orchal and orchil. Origin: OF. Orchel, orcheil, It. Orcella, oricello, or OSp. Orchillo. Cf. Orchil. Source: Websters Dictionary (01 Mar 1998) |
| archimandrite | A chief of a monastery, corresponding to abbot in the Roman Catholic church. A superintendent of several monasteries, corresponding to superior abbot, or father provincial, in the Roman Catholic church. Origin: L. Archimandrita, LGr.; pref. (E. Arch-) + an inclosed space, esp. For cattle, a fold, a monastery. Source: Websters Dictionary (01 Mar 1998) |
| archimedes | <paleontology> An extinct genus of Bryzoa characteristic of the subcarboniferous rocks. Its form is that of a screw. Source: Websters Dictionary (01 Mar 1998) |
| archin | <chemistry> An orange-red crystalline substance, C15H10O5, obtained from the buckthorn, rhubarb, etc, and regarded as a derivative of anthraquinone; so called from a species of rhubarb (Rheum emodei). Source: Websters Dictionary (01 Mar 1998) |
| archipallium | Synonym: archicortex. Origin: archi-+ L. Pallium (05 Mar 2000) |
| archipterygium | <anatomy> The primitive form of fin, like that of Ceratodus. Origin: NL, fr. Gr. Pref. (E. Arch-) + wing, fin. Source: Websters Dictionary (01 Mar 1998) |
| architect | 1. A person skilled in the art of building; one who understands architecture, or makes it his occupation to form plans and designs of buildings, and to superintend the artificers employed. 2. A contriver, designer, or maker. "The architects of their own happiness." (Milton) "A French woman is a perfect architect in dress." (Coldsmith) Origin: L. Architectus, architecton, Gr. Chief artificer, master builder; pref. (E. Archi-) + workman, akin to art, skill, to produce: cf. F. Architecte, It. Architetto. See Technical. Source: Websters Dictionary (01 Mar 1998) |
| architectonics | The specific arrangement of cells in tissue, often used to refer to the arrangement of nerve cells in the brain (cerebral cortex). (27 Sep 1997) |