| ABSCONDS | • absconds v. Third-person singular simple present indicative form of abscond. • ABSCOND v. to depart suddenly and secretly. |
| ARCSECONDS | • arcseconds n. Plural of arcsecond. • arc-seconds n. Plural of arc-second. • ARCSECOND n. a unit of angle measurement, 1/3600 of a degree, also ARCSEC. |
| ATTOSECONDS | • attoseconds n. Plural of attosecond. • ATTOSECOND n. ten to the power of minus eighteen seconds. |
| FEMTOSECONDS | • femtoseconds n. Plural of femtosecond. • FEMTOSECOND n. one quadrillionth part of a second. |
| MICROSECONDS | • microseconds n. Plural of microsecond. • MICROSECOND n. one millionth of a second. |
| MILLISECONDS | • milliseconds n. Plural of millisecond. • MILLISECOND n. a thousandth part of a second. |
| NANOSECONDS | • nanoseconds n. Plural of nanosecond. • NANOSECOND n. a billionth of a second. |
| PICOSECONDS | • picoseconds n. Plural of picosecond. • PICOSECOND n. a trillionth of a second. |
| SECONDS | • seconds n. Plural of second. • seconds n. A second helping of food for one person, or refill of coffee or other drink. • seconds n. An item of clothing that has failed quality control and is sold at a discount. |
| YOCTOSECONDS | • yoctoseconds n. Plural of yoctosecond. • YOCTOSECOND n. a very small unit of time. |
| ZEPTOSECONDS | • zeptoseconds n. Plural of zeptosecond. • ZEPTOSECOND n. a 10 to the -21 part of a second. |