| cleavage cell | One of the cells produced as the result of cell division, cleavage, in the fertilized egg. (18 Nov 1997) |
|---|---|
| cleavage division | The rapid mitotic division of the zygote with decrease in size of individual cells or blastomeres and the formation of a morula. See: cleavage. (05 Mar 2000) |
| cleavage lines | Lines which can be extrapolated by connecting linear openings made when a round pin is driven into the skin of a cadaver, resulting from the principal axis of orientation of the subcutaneous connective tissue (collagen) fibres of the dermis; they vary in direction with the region of the body surface. Synonym: Langer's lines. (05 Mar 2000) |
| cleavage product | A substance resulting from the splitting of a molecule into two or more simpler molecules. (05 Mar 2000) |
| cleavage site | A sequence in DNA that can be recognised and cut by a specific restriction enzyme. (12 Dec 1998) |
| cleavage spindle | The spindle formed during the cleavage of a zygote or its blastomeres. (05 Mar 2000) |
| cleavage stage, ovum | The embryo in its earliest stage, lasting from the first mitotic division of the fertilised ovum into two blastomeres to the formation of the morula, a compact mass of blastomeres. (12 Dec 1998) |
| cleaved cell | A cell with single or multiple clefts in the nuclear membrane. (05 Mar 2000) |
| cleaver | A heavy knife for cutting or chopping. (05 Mar 2000) |
| Cleemann's sign | <clinical sign> In fracture of the femur with overriding of the fragments, wrinkling of the skin occurs directly above the patella. (05 Mar 2000) |
| Cleemann, Richard Alsop | <person> U.S. Physician, 1840-1912. See: Cleemann's sign. (05 Mar 2000) |
| cleft | A fissure. (05 Mar 2000) |
| cleft hand | A congenital deformity in which the division between the fingers, especially between the third and fourth, extends into the metacarpal region. See: lobster-claw deformity. Synonym: main fourchee, split hand. (05 Mar 2000) |
| cleft lip | <embryology, paediatrics> A genetic disorder that results in the failure of fusion in the upper lip. Also seen commonly in association with cleft palate. (13 Nov 1997) |
| cleft nose | A nose with a furrow where the bridge is normally present; due to failure of complete convergence of the paired primordia. (05 Mar 2000) |