The past historic tense.

In a historic manner; with reference to history or the historical record. / According to history: formerly, in the past, traditionally. / To an unprecedented or extremely rare degree.

A writer of history; a chronicler; an annalist. / One who studies or researches history. / (medicine) One who recounts their own medical history.

breakdown of bodily tissues

a genealogist or historian who studies family history

An extension to genealogy in which the life and times of the people concerned are investigated.

An expert in art history.

The study of the history of the visual arts.

(immunology) Any of the human leukocyte antigens (HLAs) which are the determinants of histocompatibility

The condition of being histocompatible / The toleration of grafts between genetically similar individuals