| amphineura | <zoology> A division of Mollusca remarkable for the bilateral symmetry of the organs and the arrangement of the nerves. Origin: NL, fr. + sinew, nerve. Source: Websters Dictionary (01 Mar 1998) |
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| amphinucleolus | A double nucleolus having both basophilic and oxyphilic components. Origin: amphi-+ L. Nucleolus, dim. Of nucleus, kernel (05 Mar 2000) |
| amphions | Ion's possessing both a negative charge and a positive charge, each localised at a different point in the molecule, which thus has both positive and negative "poles"; amino acids are the most notable dipolar ion's, containing a positively charged NH3+ group and a negatively charged COO- group at neutral pH. Synonym: amphions, zwitterions. (05 Mar 2000) |
| amphioxus | <zoology> A fishlike creature (Amphioxus lanceolatus), two or three inches long, found in temperate seas; also called the lancelet. Its body is pointed at both ends. It is the lowest and most generalised of the vertebrates, having neither brain, skull, vertebrae, nor red blood. It forms the type of the group Acrania, Leptocardia, etc. Origin: NL, fr. Gr. + sharp. Source: Websters Dictionary (01 Mar 1998) |
| amphipathic | <biochemistry> Of a molecule, having both hydrophobic and hydrophilic regions. Can apply equally to small molecules, such as phospholipids and macromolecules such as proteins. (18 Nov 1997) |
| amphiphilic | Synonym: amphipathic. Origin: amphi-+ G. Philos, fond (05 Mar 2000) |
| amphiphobic | Synonym: amphipathic. Origin: amphi-+ G. Phobos, fear (05 Mar 2000) |
| amphiphysin | <protein> Protein of the nerve terminal that associates with synaptic vesicles, probably through AP2 and synaptotagmin. (18 Nov 1997) |
| amphipneust | <zoology> One of a tribe of Amphibia, which have both lungs and gills at the same time, as the proteus and siren. Origin: Gr. + one who breathes, to breathe. Source: Websters Dictionary (01 Mar 1998) |
| amphipod | <zoology> One of the Amphipoda. Source: Websters Dictionary (01 Mar 1998) |
| amphipoda | <zoology> A numerous group of fourteen footed Crustacea, inhabiting both fresh and salt water. The body is usually compressed laterally, and the anterior pairs or legs are directed downward and forward, but the posterior legs are usually turned upward and backward. The beach flea is an example. See Tetradecapoda and Arthrostraca. Origin: NL, FR. Gr. +, foot. Source: Websters Dictionary (01 Mar 1998) |
| amphipodan | <zoology> Of or pertaining to the Amphipoda. Source: Websters Dictionary (01 Mar 1998) |
| amphipodous | <zoology> Of or pertaining to the Amphipoda. Source: Websters Dictionary (01 Mar 1998) |
| amphiprotic solvent | A solvent capable of acting as an acid or a base; e.g., H2O. See: solvolysis. (05 Mar 2000) |
| amphiregulin | <growth factor> A growth factor containing an EGF like domain. (05 Feb 1998) |