TETRAZINE
Tet*raz"ine, n. Also -in. [Tetrazo- + -ine.] (Chem.)
Definition: A hypothetical compound, C2H2N4 which may be regarded as benzene with four CH groups replaced by nitrogen atoms; also, any of various derivatives of the same. There are three isomeric varieties.
Source: Webster’s Unabridged Dictionary 1913 Edition
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7 April 2025
SUPERFETATION
(noun) fertilization of a second ovum after a pregnancy has begun; results in two fetuses of different ages in the uterus at the same time; “superfetation is normal in some animal species”
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