Definition that contains theodor
- rough rider a member of the volunteer cavalry regiment led by Theodore Roosevelt in the Spanish-American War (1898)
- cell doctrine (biology) the theory that cells form the fundamental structural and functional units of all living organisms; proposed in 1838 by Matthias Schleiden and by Theodor Schwann
- theodore roosevelt memorial national park a national park in North Dakota that includes the site of former President Theodore Roosevelt's ranch
- cell theory (biology) the theory that cells form the fundamental structural and functional units of all living organisms; proposed in 1838 by Matthias Schleiden and by Theodor Schwann
- progressive party a former political party in the United States; founded by Theodore Roosevelt during the presidential campaign of 1912; its emblem was a picture of a bull moose
- bull moose party a former political party in the United States; founded by Theodore Roosevelt during the presidential campaign of 1912; its emblem was a picture of a bull moose