- extension rule,
- extension tube,
- extensor muscle of fingers,
- extensor muscle of index finger
Origin of extensive
- of or relating to logical extension
- (of a definition) in terms of the objects to which the term applies rather than its meaning
"vast, far-reaching;" c.1600 of immaterial, c.1700 of material things; from Late Latin extensivus, from extens-, past participle stem of Latin extendere (see extend). Earlier in a medical sense, "characterized by swelling" (early 15c.). Related: Extensively; extensiveness.