We don't have synonyms for hypothalami yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are hypothalamus, hypothalamic and hypothalli.
(n) :
(neuroanatomy) A region of the forebrain located below the thalamus, forming the basal portion of the diencephalon, and functioning to regulate body temperature, some metabolic processes and governing the autonomic nervous system.
(n) :
(neuroanatomy) A region of the forebrain located below the thalamus, forming the basal portion of the diencephalon, and functioning to regulate body temperature, some metabolic processes and governing the autonomic nervous system.