Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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Caesarean section (sometimes l.c.) a method of delivering an endangered fetus, in which an incision is made through the walls of the mother's abdomen and uterus.
conic section in geometry, a curve, such as an ellipse, hyperbola, or parabola, created by the intersection of a plane and a right circular cone.
cross section a part of something made visible by cutting straight through it. [2 definitions]
golden section in mathematics and the fine arts, a relationship between two dimensions of a plane figure, or two segments of a line, such that the ratio of the smaller to the larger is the same as that of the larger to the sum of the two, or about .62 to 1.00.
quarter section a unit of area equal to one fourth of a section, one fourth of a square mile, or 160 acres, used in dividing land into square parcels.
rhythm section the instruments in a band or orchestra that provide the rhythmic beat, such as drums or a bass guitar.