| hidden | From Hide. Concealed; put out of view; secret; not known; mysterious. Hidden fifths or octaves, consecutive fifths or octaves, not sounded, but suggested or implied in the parallel motion of two parts towards a fifth or an octave. Synonym: Hidden, Secret, Covert. Hidden may denote either known to on one; as, a hidden disease; or intentionally concealed; as, a hidden purpose of revenge. Secret denotes that the thing is known only to the party or parties concerned; as, a secret conspiracy. Covert literally denotes what is not open or avowed; as, a covert plan; but is often applied to what we mean shall be understood, without openly expressing it; as, a covert allusion. Secret is opposed to known, and hidden to revealed. "Bring to light the hidden things of darkness." (1 Cor. Iv. 5) "My heart, which by a secret harmony Still moves with thine, joined in connection sweet." (Milton) "By what best way, Whether of open war, or covert guile, We now debate." (Milton) Source: Websters Dictionary (01 Mar 1998) |
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| hidden nail skin | 1. The thin, condensed, eleidin-rich layer of epidermis which procedes and initially covers the nail plate in the embryo. It normally degenerates by the eighth month except at the nail base where it remains as the cuticle of the nail. 2. The corneal layer of epidermis overlapping and in direct contact with the nail root proximally or the sides of the nail plate laterally, forming the undersurface of the nail wall or nail folds of nail. Synonym: hidden nail skin, perionychium. 3. The thin skin adherent to the nail at its proximal portion. Synonym: epionychium. Origin: G. Epi, upon, + onyx (onych-), nail (05 Mar 2000) |
| hidden part | <anatomy> An obsolete term, pars tecta duodeni, the part of duodenum covered by the root of the transverse mesocolon, the coalescence of the ascending mesocolon, and the root of the mesentery, pars tecta pancreatis, hidden portion of the pancreas; part of the pancreas covered by the root of the transverse mesocolon, the coalescence of the ascending mesocolon, and the root of the mesentery, pars tecta renalis, hidden portion of the kidney; part of the kidney covered by the root of the transverse mesocolon, pars tecta ureteralis, hidden portion of the ureter; part of the right ureter covered (crossed) by the root of the mesentery, and of the left ureter covered (crossed) by the root of the sigmoid mesocolon. Synonym: hidden part. (05 Mar 2000) |
| antigenic determinant | That part of an antigenic molecule against which a particular immune response is directed. For instance a tetra to penta peptide sequence in a protein, a tri to penta glycoside sequence in a polysaccharide. In the animal most antigens will present several or even many antigenic determinants simultaneously. See: hapten. (18 Nov 1997) |
| genetic determinant | Any antigenic determinant or identifying characteristic, particularly those of allotypes. Synonym: genetic marker. (05 Mar 2000) |
| mathematical determinant | A formal algebraic operation on the terms of a square matrix of quantities, fundamental in solving multiple simultaneous equations and widely used in regression analysis, notably in epidemiology and quantitative genetics. If determinant is zero, the equations have no unambiguous solution. (05 Mar 2000) |
| determinant | 1. That which serves to determine; that which causes determination. 2. <mathematics> The sum of a series of products of several numbers, these products being formed according to certain specified laws; thus, the determinant of the nine numbers. Is a b' c'' a b'' c' + a' b'' c] a' b c'' + a'' b' c. The determinant is written by placing the numbers from which it is formed in a square between two vertical lines. The theory of determinants forms a very important branch of modern mathematics. 3. <logic> A mark or attribute, attached to the subject or predicate, narrowing the extent of both, but rendering them more definite and precise. Source: Websters Dictionary (01 Mar 1998) |
| determinant group | That part of an antigenic molecule against which a particular immune response is directed. For instance a tetra to penta peptide sequence in a protein, a tri to penta glycoside sequence in a polysaccharide. In the animal most antigens will present several or even many antigenic determinants simultaneously. See: hapten. (18 Nov 1997) |
| idiotypic antigenic determinant | The antigenic specificites defined by the unique sequences (idiotopes) of the antigen combining site. Thus anti-idiotype antibodies combine with those specific sequences, may block immunological reactions and may resemble the epitope to which the first antibody reacts. (18 Nov 1997) |
| isoallotypic determinant | <genetics> Genetic determinant's that are both isotypic and allotypic in that they appear in all members of at least one subclass of immunoglobulin but only in some members of another subclass of the same species. (05 Mar 2000) |