| strontium. |
| steradian. |
| 1. | Senhor. |
| 2. | Senior. |
| 3. | Señor. |
| 4. | Sir. |
| 5. | Ecclesiastical. Sister. Origin: < L Soror  |
| Sons of the Revolution. |
| a noncommissioned enlisted person of the lowest rank. Abbreviation: SR |
[sin-yawr, -yohr; Port. si-nyawr] 
[si-nyaw-rish] . | a Portuguese term of address equivalent to sir or Mr., used alone or capitalized and prefixed to the name of a man. Abbreviation: Sr. |
[seyn-yawr, -yohr, seen-; Sp. se-nyawr] [se-nyaw-res] . | a Spanish term of address equivalent to sir or Mr., used alone or capitalized and prefixed to the name of a man. Abbreviation: Sr. |
| seaman recruit n.
|
| sr abbr. steradian |
| Sr The symbol for the element strontium. |
| SR abbr. seaman recruit |
| ste·ra·di·an (stĭ-rā'dē-ən) n. Abbr. sr A unit of measure equal to the solid angle subtended at the center of a sphere by an area on the surface of the sphere that is equal to the radius squared: The total solid angle of a sphere is 4π steradians. See Table at measurement. [ste(reo)- + radian.] |
| stron·ti·um (strŏn'chē-əm, -tē-əm, -shəm) n. Symbol Sr A soft, silvery, easily oxidized metallic element that ignites spontaneously in air when finely divided. Strontium is used in pyrotechnic compounds and various alloys. Atomic number 38; atomic weight 87.62; melting point 769°C; boiling point 1,384°C; specific gravity 2.54; valence 2. See Table at element. [From New Latin strontia, strontium oxide, from English strontian; see strontianite.] stron'tic (-tĭk) adj. |
Sr
The symbol for the element strontium.
| Sr
The symbol for strontium. |
| steradian (stĭ-rā'dē-ən) Pronunciation Key
A unitless measure of solid angles. A solid angle projecting from the center of a sphere and cutting its surface has a measure of s/r2 steradians, where s is the surface area of the sphere cut out by the solid angle, and r is the radius of the sphere. See also radian. |
| strontium (strŏn'chē-əm, -tē-əm) Pronunciation Key
Symbol Sr A soft, silvery metallic element of the alkaline-earth group that occurs naturally only as a sulfate or carbonate. One of its isotopes is used in the radiometric dating of rocks. Because strontium salts burn with a red flame, they are used to make fireworks and signal flares. Atomic number 38; atomic weight 87.62; melting point 769°C; boiling point 1,384°C; specific gravity 2.54; valence 2. See Periodic Table. |
SR language
Synchronizing Resources.
A language for concurrent programming.
"Resources" encapsulate processes and variables they share. Each Resource can be separately compiled. "Operations" provide the primary mechanism for process interaction.
SR provides a novel integration of the mechanisms for invoking and servicing operations. Consequently, it supports local and remote procedure call, rendezvous, message passing, dynamic process creation, multicast, semaphores and shared memory.
Version 2.2 has been ported to Sun-3, Sun-4, Decstation, SGI Iris, HP PA, HP 9000/300, NeXT, Sequent Symmetry, DG AViiON, RS/6000, Multimax, Apollo and others.
(ftp://cs.arizona.edu/sr/sr.tar.Z).
E-mail:
["An Overview of the SR Language and Implementation", G. Andrews, ACM TOPLAS 10:51-86 (Jan 1988)].
["The SR Programming Language: Concurrency in Practice", G.R. Andrews et al, Benjamin/Cummings 1993, ISBN 0-8053-0088-0].
(1992-09-01)
sr networking
The country code for Suriname.
(1999-01-27)
sr
|
Sr
|
SR
|
sr
unit of solid-angle measure in the International System of Units (SI), defined as the solid angle of a sphere subtended by a portion of the surface whose area is equal to the square of the sphere's radius. Since the complete surface area of a sphere is 4pi times the square of its radius, the total solid angle about a point is equal to 4pi steradians. Derived from the Greek for solid and the English word radian, a steradian is, in effect, a solid radian; the radian is an SI unit of plane-angle measurement defined as the angle of a circle subtended by an arc equal in length to the circle's radius
Learn more about sr with a free trial on Britannica.com.