We don't have synonyms for idant yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are aidant, ident and dant.
(n) :
(biology, archaic) One of the nuclear rods or chromosomes in a fertilized ovum, supposed to contain an aggregate of the ids, or all kinds of biophores of the organism.
(n) :
(biology, archaic) One of the nuclear rods or chromosomes in a fertilized ovum, supposed to contain an aggregate of the ids, or all kinds of biophores of the organism.