the option to buy or sell a given stock (or stock index or commodity future) at a given price before a given date; consists of an equal number of put and call options
the act of sitting or standing astride
a gymnastic exercise performed with a leg on either side of the parallel bars
a sharp rigid animal process or appendage; as a porcupine quill or a ridge on a bone or a ray of a fish fin
the part of a book's cover that encloses the inner side of the book's pages and that faces outward when the book is shelved; "the title and author were printed on the spine of the book"
a small sharp-pointed tip resembling a spike on a stem or leaf