
1) Medicinaloil 
Found on 
https://www.crosswordclues.com/clue/castor

1) Alpha geminorum 2) An Argonaut 3) Beaver hat 4) Bright star in Gemini 5) Brother of Olive Oyl 6) Brother of Pollux 7) Cathrtic oil 8) Famous twin 9) French word used in English 10) Gemini figure 11) Gemini twin 12) Hat of beaver fur 13) Heavenly twin 14) Henry Draper Catalogue object 15) HR object 
Found on 
https://www.crosswordclues.com/clue/castor

1) Hat 
Found on 
https://www.crosswordclues.com/clue/castor

small bottle or jar with a perforated top used for sprinkling pepper, sugar, etc. on food.
Found on 
http://charlesdickenspage.com/glossary.html

scent from the gland of a beaver
Found on 
http://imnh.isu.edu/digitalatlas/bio/glsry.htm

• (n.) Castoreum. See Castoreum. • (n.) the northernmost of the two bright stars in the constellation Gemini, the other being Pollux. • (n.) Alt. of Castorite • (n.) A genus of rodents, including the beaver. See Beaver. • (n.) A hat, esp. one made of beaver fur; a beaver. • (n.) See Caster, a small wheel. • (n.) A...
Found on 
http://thinkexist.com/dictionary/meaning/castor/

multiple star having at least six component stars, in the zodiacal constellation Gemini. The stars Castor and Pollux are named for the twins of Greek ... [2 related articles]
Found on 
http://www.britannica.com/eb/a-z/c/34

one of the Dioscuri (sons of Zeus), along with Pollux, both born of Leda. Their sisters were Clytemnestra and Hellen of Troy. They joined Jason?s quest for the Golden Fleece, among other adventures. Because Castor?s father was Tyndareus, he was able to die, whereupon he and his brother appeared in the sky as Gemini.
Found on 
http://www.chalquist.com/writings/greekmyth/
 (Alpha Geminorum)
(Alpha Geminorum) The second brightest star in the constellation Gemini and, in mythology, the twin of Pollux. Though appearing as a single white star to the naked eye, Castor is really a remarkable multiple system, consisting of three stellar pairs. A modest telescope sh...
Found on 
http://www.daviddarling.info/encyclopedia/C/Castor.html
 Cas'tor  noun
Cas'tor  noun [ Latin 
 castor the beaver, Greek ...; of uncertain origin.] 
 1.  (Zoology) A genus of rodents, including the beaver. See 
 Beaver .  
 2.  Castoreum. See 
 Castoreum .  
 3.  A hat, esp. one made of beaver fur; a beaver. « I have always been ...
Found on 
http://www.encyclo.co.uk/webster/C/33
 Cast'or  noun
Cast'or  noun  See 
 Caster , a small wheel. 
Found on 
http://www.encyclo.co.uk/webster/C/33

Castor is a star (Alpha Geminorum) of magnitude 1.6, the fainter star of the zodiacal constellation Gemini, or the Twins. In 1719 it was discovered to be a visual binary star, with components of magnitudes 2.8 and 2.0 separated by 6 seconds of arc and revolving around each other in about 350 years. Each of these components has been found to be a sp...
Found on 
http://www.probertencyclopaedia.com/browse/AC.HTM

Castor is a reddish-brown bitter substance obtained from the anal glands of the beaver and used in perfume and medicine.
Found on 
http://www.probertencyclopaedia.com/browse/GC.HTM

Castor is a variety of the mineral petalite, from Elba.
Found on 
http://www.probertencyclopaedia.com/browse/HC.HTM

A castor is a beaver-fur hat.
Found on 
http://www.probertencyclopaedia.com/browse/PC.HTM

The Castor was a French minelayer of 3150 tons displacement originally built by Swan Hunter as an ice breaker for the Russian navy and launched in 1916 as the Kozma Minin. The Castor was powered by coal fired boilers providing a top speed of 14.5 knots and carried a complement of 167. She was armed with four 3.9 inch guns; two 37 mm anti-aircraft g...
Found on 
http://www.probertencyclopaedia.com/browse/RC.HTM

Castor (shortened from castor oil) is London Cockney rhyming slang for royal.
Found on 
http://www.probertencyclopaedia.com/browse/ZC.HTM

[
n] - a multiple star with 6 components 2. [n] - type genus of the Castoridae: beavers
Found on 
http://www.webdictionary.co.uk/definition.php?query=Castor

Thermal imaging camera [FR], The operations at Dien Bien Phu, Vietnam [FR], Corps Airborne Stand-Off Radar. Later renamed ASTOR [UK]
Found on 
https://www.encyclo.co.uk/local/20785
 genus Castor noun
genus Castor noun type genus of the Castoridae: beavers
Found on 
https://www.encyclo.co.uk/local/20974

One of Dioscuri.
Found on 
https://www.infoplease.com/arts-entertainment/mythology/greek-and-roman-myt
  No exact match found.