Synapse (Gr. syn, together; hapto, unite), the coming in contact of the processes of one nerve cell with the processes or body of another.
Synapsis (Gr. syn, together; hapto, unite), union of the chromosomes in pairs preliminary to the reduction division.
Telegony (Gr. telegonos, born far away), the supposed influence of an earlier sire on offspring born later of the same mother to a different sire.
Thermotropism (Gr. thero, heat; tropē, turning), defined, [p. 198].
Thigmotropism (Gr. thigmo, touch; tropē, turning), defined, [p. 198].
Toxin (Gr. toxicon, poison), poisonous compounds of animal, vegetable, or bacterial origin.
Tropism (Gr. tropē, turning), the automatic directing of an organism toward or away from a source of stimulus.
Unit-Character, a character which behaves as an indivisible unit in heredity.
Vasectomy (L. vas, vessel; ektomē, cutting out), removal of a portion of the vas deferens (duct for conveying spermatozoa).