S: (n) straight line (a line traced by a point traveling in a constant direction; a line of zero curvature) "the shortest distance between two points is a straight line"
S: (n) line (a length (straight or curved) without breadth or thickness; the trace of a moving point)
S: (n) shape, form (the spatial arrangement of something as distinct from its substance) "geometry is the mathematical science of shape"
S: (n) attribute (an abstraction belonging to or characteristic of an entity)
S: (n) vector, transmitter (any agent (person or animal or microorganism) that carries and transmits a disease) "mosquitos are vectors of malaria and yellow fever"; "fleas are vectors of the plague"; "aphids are transmitters of plant diseases"; "when medical scientists talk about vectors they are usually talking about insects"