-Time Words-

Chronon-
one-billionth of a trillionth of a second

Femtosecond-
0.0000000000000001 of a second

Picosecond-
0.000000000001 of a second

Microsecond-
0.000001 (one-millinth) of a second

Millisecond-
0.001 (one-thousandth)

Centisecond-
0.01 (one-hundrdth) of a second

Week-
seven days; in shakespearean times, it was also called a sennight, or seven nights

Fortnight-
two weeks (from the old english for 14 nights)

Month-
full moon to full moon

Bimester-
two months

Trimester-
three months

Year-
365 days n 6 hour

Solar day-
approximately 23 hous 56 minutes

Solar year-
365.24219 solar days or 365 days 5 hours 48 minutes 45.51 seconds

Leap year-
366 days

Decade-
10 year; also called a decennium

Century-
100 years

Millennium-
1000 year; also called a chiliad

Bimilliennium-
2,000 years

Era-
a period of time measured from some important event

Aeon or eon-
a long period of time, usually thousands of years; in geology and astronomy it is one billion years

Epoch-
a geological era or very long period of time