As nouns the difference between isotope and astration
is that isotope is (physics) any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei as a consequence, atoms for the same isotope will have the same atomic number but a different mass number (atomic weight) while astration is (physics|astronomy) in the galactic cycle of matter, the incorporation of matter into a stellar interior during star formation, especially when referring to a specific element or isotope.
As a verb isotope
is (topology|transitive) to define or demonstrate an isotopy of (one map with another).
isotope
Etymology 1
Coined in 1914 by British chemist Frederick Soddy from (etyl) .
Noun
(
en noun)
(physics) Any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei. As a consequence, atoms for the same isotope will have the same atomic number but a different mass number (atomic weight).
Derived terms
* isotope analysis
* isotope dilution
* isotope geochemistry
* isotope hydrology
* isotope map
* isotope separation
* isotope shift
* isotope table
See also
* isobar
* isotone
Etymology 2
Possible back-formation from isotopy.
Verb
(isotop)
(topology) To define or demonstrate an isotopy of (one map with another).
Related terms
* homotope
astration
English
Noun
(
en noun)
(physics, astronomy) In the galactic cycle of matter, the incorporation of matter into a stellar interior during star formation, especially when referring to a specific element or isotope. 
