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There are 4 thirteen-letter words beginning with TOPO

TOPOCHEMISTRY• topochemistry n. (Chemistry) The chemistry of reactions that are dependent on, or change, the topology of the reactants.
• TOPOCHEMISTRY n. the study of reactions that only occur at specific regions in a system.
TOPOGRAPHICAL• topographical adj. Topographic.
• TOPOGRAPHICAL adj. relating to topography, also TOPOGRAPHIC.
TOPOISOMERASE• topoisomerase n. (Biochemistry) Any of several enzymes that affect the topology of DNA, especially ones that relax supercoiling.
• TOPOISOMERASE n. any of a class of enzymes that reduce supercoiling in DNA by breaking and rejoining one or both strands of the DNA molecule.
TOPOLOGICALLY• topologically adv. In a topological manner.
• TOPOLOGICAL adv. relating to topology, also TOPOLOGIC.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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