
1) Alchemical tool 2) Chemical apparatus 3) Pear-shaped bottle in a lab 4) Pear-shaped lab vessel 5) Type of container
Found on
https://www.crosswordclues.com/clue/aludel

An aludel is a subliming pot used in alchemy and medieval chemistry. The term refers to a range of earthen tubes, or pots without bottoms, fitted one over another, and diminishing as they advance towards the top. The lowest is adapted to a pot, placed in a furnace, wherein the matter to be sublimed is placed. At the top is a head to retain the flo...
Found on
http://en.wikipedia.org/wiki/Aludel

pear-shaped pot used in sublimation
Found on
http://phrontistery.info/a.html

• (n.) One of the pear-shaped pots open at both ends, and so formed as to be fitted together, the neck of one into the bottom of another in succession; -- used in the process of sublimation.
Found on
http://thinkexist.com/dictionary/meaning/aludel/
Al'u·del noun [ French & Spanish
aludel , from Arabic
aluthāl .]
(Chemistry) One of the pear-shaped pots open at both ends, and so formed as to be fitted together, the neck of one into the bottom of another in succession; -- used in the process of sublimation.
Ure. Found on
http://www.encyclo.co.uk/webster/A/64

one of a series of pearshaped vessels of earthenware or glass, open at both ends and fitted one above the other, for recovering the sublimates produced during sublimation.
Found on
https://www.infoplease.com/dictionary/aludel
No exact match found.