A teratogen is a substance that produces a malformation in a foetus.
Three-dimensional Quantitative Structure-Activity Relationship (3D-QSAR)
A three-dimensional quantitative structure-activity relationship is the analysis of the quantitative relationship between the biological activity of a set of compounds and their spatial properties using statistical methods.
Topliss tree
A Topliss tree is an operational scheme for analog design.
Transition-state analog
A transition-state analog is a compound that mimics the transition state of a substrate bound to an enzyme.
Xenobiotic
A xenobiotic is a compound foreign to an organism (xenos [greek] = foreign).
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