plural of second moment of area

A blood relative who shares roughly a quarter of a person's DNA, such as a grandparent, aunt, uncle, half-sibling, grandchild, niece, or nephew.

plural of second-degree relative

An SI derived unit for measuring speed or velocity.

plural of metre per second

A period of feminist activity that began in the early 1960s in the United States and broadened the gender equality debate to include family, the workplace, reproductive rights, etc.

plural of second-growth forest

(uncommon) Alternative form of second-to-last

(uncommon) Alternative form of second to last

(slang) To get as far as feeling up in sexual advances.