(genetics) the act of mixing different species or varieties of animals or plants and thus to produce hybrids | the act of participating in an athletic competition involving running on a track |
(genetics) an organism that is the offspring of genetically dissimilar parents or stock; especially offspring produced by breeding plants or animals of different varieties or breeds or species | any road or path affording passage especially a rough one |
a wooden structure consisting of an upright post with a transverse piece | a bar or pair of parallel bars of rolled steel making the railway along which railroad cars or other vehicles can roll |
a marking that consists of lines that cross each other | a pair of parallel rails providing a runway for wheels |
any affliction that causes great suffering | a groove on a phonograph recording |
| (computer science) one of the circular magnetic paths on a magnetic disk that serve as a guide for writing and reading data |
| a course over which races are run |
| an endless metal belt on which tracked vehicles move over the ground |
| evidence pointing to a possible solution |
| a distinct selection of music from a recording or a compact disc |
| a line or route along which something travels or moves |