We don't have synonyms for castellanus yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are castellan, castellanos and castellans.
(n) :
(meteorology) A cloud species which shows vertical formations giving a crenellated appearance, associated with cirrus, cirrocumulus, altocumulus, and stratocumulus genera.
(n) :
Alternative form of castellan. [(obsolete) A feudal lord with a fortified manor.]
(n) :
(meteorology) A cloud species which shows vertical formations giving a crenellated appearance, associated with cirrus, cirrocumulus, altocumulus, and stratocumulus genera.
(n) :
Alternative form of castellan. [(obsolete) A feudal lord with a fortified manor.]