{ Lo*gis"tic (?), Lo*gis"tic*al (?), } a. [Gr. &?; skilled in calculating, &?; to calculate, fr. lo`gos word, number, reckoning: cf. F. logistique.] 1. Logical. [Obs.] Berkeley.

2. (Math.) Sexagesimal, or made on the scale of 60; as, logistic, or sexagesimal, arithmetic.

Logistic, or Proportional, logarithms, certain logarithmic numbers used to shorten the calculation of the fourth term of a proportion of which one of the terms is a given constant quantity, commonly one hour, while the other terms are expressed in minutes and seconds; -- not now used.