1. The unit of solid angle adopted under the Système International d'Unités
   - steradian

1. Used of the older of two persons of the same name especially used to distinguish a father from his son
   "Bill Adams, Sr."
   - elder, older

1. A soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
   - strontium, atomic number 38

Derived forms: srs

See also: senior

Type of: angular unit, metal, metallic element

Part of: celestite, sphere, strontianite

Encyclopedia: Sr

• scrapper
• scrappily
• scrappiness
• scrapple
• scrappy
• scraps
• scratch
• scratch along
• scratch awl
• scratch file
• scratch line
• scratch off
• scratch out
• scratch paper
• scratch race
• scratch sheet
• scratch test
• scratch up
• scratcher
• scratchily
• scratchiness
• scratching
• scratchpad
• scratchy
• scraunch