(a.) Having half of the similar parts of a crystals, instead of all; consisting of half the planes which full symmetry would require, as when a cube has planes only on half of its eight solid angles, or one plane out of a pair on each of its edges; or as in the case of a tetrahedron, which is hemihedral to an octahedron, it being contained under four of the planes of an octahedron.
Example Sentences:
(1) The statistics of intensity data from hemihedrally twinned specimens are analyzed in terms of a new parameter and are shown to take a simple form in both the centrosymmetric and non-centrosymmetric cases.
Symmetry
Definition:
(n.) A due proportion of the several parts of a body to each other; adaptation of the form or dimensions of the several parts of a thing to each other; the union and conformity of the members of a work to the whole.
(n.) The law of likeness; similarity of structure; regularity in form and arrangement; orderly and similar distribution of parts, such that an animal may be divided into parts which are structurally symmetrical.
(n.) Equality in the number of parts of the successive circles in a flower.
(n.) Likeness in the form and size of floral organs of the same kind; regularity.
Example Sentences:
(1) By adjustment to the swaying movements of the horse, the child feels how to retain straightening alignment, symmetry and balance.
(2) Models with a C8-symmetry and D4-symmetry can be ruled out.
(3) This lack of symmetry in shape and magnitude may be due to non-sphericity of the skull over the temporal region or to variations in conductivities of intervening tissues.
(4) Subjects with high ocular-dominance scores (right- or left-dominant subjects) showed for the green stimulus asymmetric behavior, while subjects with low ocular-dominance scores showed a tendency toward symmetry in perception.
(5) The 3' end of the cell cycle regulated mRNA terminates immediately following the region of hyphenated dyad symmetry typical of most histone mRNAs, whereas the constitutively expressed mRNA has a 1798 nt non-translated trailer that contains the same region of hyphenated dyad symmetry but is polyadenylated.
(6) US clearly images the cartilaginous femoral head and enables accurate assessment of hip size, shape, and symmetry.
(7) Termination of sar RNA synthesis occurs after transcription of the first and second Ts of a TTTA sequence following a region of hyphenated dyad symmetry.
(8) In this paper, a CD study is reported on the reconstitution of horse heart myoglobin with protoheme XIII, a heme possessing true rotational symmetry about its alpha, gamma-meso axis.
(9) A significant symmetry (trochanteric-trochanteric or cervical-cervical) was found between the first and the second hip fractures (69 per cent).
(10) We discuss the role of symmetry operations in mode calculations and the relevance of these displacement vectors to the interpretation of linear dichroism measurements performed on the A- and B-DNA helix.
(11) This symmetry, with respect to the sign of the charge, indicates that discreteness-of-charge effects are not significant in determining the potential-sensitive phase partitioning of these probes in model membranes.
(12) In 14 patients with asymmetrical baseline VERs, hypercapnia caused improvement of symmetry in five, worsening in three, and no change in six.
(13) Using a symmetry argument it is shown that the critical internal pressure for the initiation of yielding of the envelope material has a non-uniform distribution and is significantly higher for the polar regions.
(14) (2) The four EF hands are arranged in two pairs with overall symmetry, 222.
(15) Three viruses (Ff, IKe, and If1) all have five-start helices with rotation angles of 36 degrees and axial translations of 16 A (Type I symmetry), and three other viruses (Pf1, Xf, and Pf3) all have one-start helices with rotation angles of approximately equal to 67 degrees and translations of approximately 3 A (Type II symmetry).
(16) This section was characterized by its axial rotation, deviation of its midpoint from the spinal axis, and area symmetry about the midpoint.
(17) These centres do not control the nature of the nystagmic movement that consists of a slow and a fast components, the combined movements of the right and left eyes, the direction of the nystagmus, the range and the nature marking the distribution of the maximal movement and of the most frequent movements during the action of the stimulus and the symmetry of the labyrinthine function.
(18) Taking advantage of structural symmetries may critically improve the convergence while refining the target molecule or its building blocks.
(19) As such, the finite size of the cellular membrane, as well as its precise symmetry, could not be incorporated into the previous studies.
(20) Similarly, the formation of spatial dissipative structures by coupling of a transport process with an interfacial reaction was investigated as a simple experimental example of symmetry breaking.