dirigo
Latin verb
di·ri·go ˈdē-ri-ˌgō 
: I direct —motto of Maine referring by analogy to the North Star appearing on the state seal
- histochemistry
- histochemograph
- histochemography
- histocompatibilities
- histocompatibility
- histocyte
- histodialyses
- histogen
- histogen theory
- histogeneses
- histogenesis
- histogenetic
- histogenetics
- histogenic
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- histogram
- histograms
- histography
- histologic
- histological
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- histologists