ᱴᱤᱯᱤᱡ

ᱴᱤᱯᱤᱡ (ᱤᱝᱞᱤᱥ: Second), (ᱪᱤᱱᱦᱟᱹ : s,ᱠᱷᱟᱴᱚ ᱛᱮ: sec) ᱫᱚ ᱡᱮᱡᱟᱹᱛᱤᱭᱟᱹᱨᱤ ᱮᱠᱚᱠ ᱯᱟᱱᱛᱷᱟ (SI) ᱨᱮ ᱚᱠᱛᱚ ᱨᱮᱭᱟᱜ ᱢᱩᱬᱩᱛ ᱮᱠᱚᱠ ᱠᱟᱱᱟ ᱾ ᱥᱟᱫᱷᱟᱬᱚᱱ ᱟᱨ ᱱᱟᱜᱟᱢᱟᱱᱟᱜ ᱢᱮᱱᱮᱛ ᱞᱮᱠᱟᱛᱮ ᱢᱤᱫ ᱢᱟᱦᱟᱸ ᱨᱮᱱᱟᱜ ​^᱑⁄_{᱘᱖᱔᱐᱐᱐} ᱦᱟᱹᱴᱤᱧ – ᱯᱳᱭᱞᱳ ᱨᱮ ᱢᱟᱦᱟᱸ ᱫᱚ ᱒᱔ ᱴᱟᱲᱟᱝ ᱨᱮ, ᱚᱱᱟ ᱛᱟᱭᱚᱢ ᱖᱐ ᱴᱤᱲᱤᱡ ᱨᱮ ᱟᱨ ᱢᱩᱪᱟᱹᱫ ᱨᱮ ᱖᱐ ᱴᱤᱯᱤᱡ ᱨᱮ ᱦᱟᱴᱟᱬ ᱠᱟᱛᱮ ᱱᱚᱶᱟ ᱡᱩᱲᱩ (factor) ᱧᱟᱢᱚᱜᱼᱟ ᱾

A pendulum-governed escapement of a clock, ticking every second

ᱟᱨᱦᱚᱸ ᱧᱮᱞ ᱢᱮ

• ᱴᱟᱲᱟᱝ
• ᱴᱤᱲᱤᱡ

ᱵᱟᱨᱦᱮ ᱡᱚᱱᱚᱲ

• National Physical Laboratory: Trapped ion optical frequency standards
• High-accuracy strontium ion optical clock; National Physical Laboratory (2005)
• National Research Council of Canada: Optical frequency standard based on a single trapped ion
• NIST: Definition of the second; notice the cesium atom must be in its ground state at 0 K
• Official BIPM definition of the second
• The leap second: its history and possible future
• What is a Cesium atom clock?
• Accuracy of the time — Astronoo