| holocrine | Form of secretion in which the whole cell is shed from the gland, usually after becoming packed with the main secretory substance. In mammals, sebaceous glands are one of the few examples. (18 Nov 1997) |
|---|---|
| holocrine gland | A gland whose secretion consists of disintegrated cells of the gland itself, e.g., a sebaceous gland, in contrast to a merocrine gland. (05 Mar 2000) |
| holocrystalline | <chemical> Completely crystalline; said of a rock like granite, all the constituents of which are crystalline. Origin: Holo + crystalline. Source: Websters Dictionary (01 Mar 1998) |
| holodiastolic | Relating to or occupying the entire diastolic period. (05 Mar 2000) |
| holoendemic | <epidemiology> An infection whose prevalence is fairly uniform throughout a region, country or continent. Often used in the malaria literature. (05 Dec 1998) |
| holoendemic disease | A disease for which a high prevalent level of infection begins early in life and affects most or all of the child population, leading to a state of equilibrium, such that the adult population shows evidence of the disease much less frequently than do the children. (05 Mar 2000) |
| holoenzyme | <enzyme> The complete enzyme complex composed of the protein portion (apoenzyme) and cofactor or coenzyme. (18 Nov 1997) |
| hologastroschisis | A congenital malformation in which a cleft extends the entire length of the abdomen. Origin: holo-+ G. Gaster, belly, + schisis, cleaving (05 Mar 2000) |
| hologram | A three-dimensional image produced by wavefront reconstruction and recorded on a photographic plate. Origin: holo-+ G. Gramma, something written (05 Mar 2000) |
| holograph | A document, as a letter, deed, or will, wholly in the handwriting of the person from whom it proceeds and whose act it purports to be. Origin: L.holographus entirely autograph, Gr. "olografos; "olos whole + grafein to write: cf. F. Holographe, olographe. Source: Websters Dictionary (01 Mar 1998) |
| holographic | Of the nature of a holograph; pertaining to holographs. Source: Websters Dictionary (01 Mar 1998) |
| holographic microscopy | <technique> A mode of light microscopy in which a highly coherent, laser beam is split into a reference and main beam, with the reference beam (usually travelling outside of the microscope) being made to interfere with the main beam that has passed through the specimen. The interference of the two mutually coherent beams forms a hologram. The depth of field gained by viewing the hologram is essentially infinitely great, and the contrast mode or observation can be switched to dark field, phase contrast, interference contrast, etc., after the hologram has been formed by the microscope in bright field. (05 Aug 1998) |
| holography | <physics> A technique for recording and later reconstructing the amplitude and phase distribution of a wave disturbance. (09 Oct 1997) |
| hologynic | Related to characters manifest only in females. Origin: holo-+ G. Gyne, woman (05 Mar 2000) |
| hologynic inheritance | Transmission of a trait from mother to her daughters but to no sons, attributed to attached (partially fused) X chromosomes, to cytoplasmic inheritance, or to sex limitation with abnormal segregation, e.g., haematocolpos. (05 Mar 2000) |