infantile neuroaxonal dystrophy (medicine) and Poincare (iou)

infantile neuroaxonal dystrophy (medicine)

infantile neuroaxonal dystrophy
<neurology, paediatrics> A rare, familial disorder of early childhood manifested as progressive psychomotor deterioration, increased reflexes, Babinski sign, hypotonia and progressive blindness. Pathologically, eosinophilic spheroids of swollen axoplasm are found in various central nervous system nuclei.

Poincare (iou)

Poincare noun. M20.
[Jules-Henri Poincare (1854-1912), French mathematician and physicist.]
Math. & Physics. Used attrib. and in possess. to designate various concepts introduced by Poincare or arising out of his work.
Poincare conjecture = Poincare's conjecture below. Poincare cycle (a single circuit of) a simple closed curve in the phase space of a system, representing one possible solution of the governing differential equations. Poincare map, Poincare mapping (a) a representation of the phase space of a dynamic system, indicating all possible trajectories; (b) = Poincare section below. Poincare's conjecture: that any simply connected compact three-dimensional manifold is topologically equivalent to a sphere. Poincare section the intersection of a Poincare map (in sense (a)) with a given line, plane, etc.

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