Defn: Relating to chronology; containing an account of events in the
order of time; according to the order of time; as, chronological
tables. Raleigh.
— Chron`o*log"ic*al*ly, adv.

CHRONOLOGIST; CHRONOLOGER
Chro*nol"o*gist, Chro*nol"o*ger, n. Etym: [Gr.

Defn: A person who investigates dates of events and transactions; one
skilled in chronology.
That learned noise and dust of the chronologist is wholly to be
avoided. Locke.
THe most exact chronologers tell us that Christ was born in October,
and not in December. John Knox.

CHRONOLOGY
Chro*nol"o*gy, n.; pl. Chronologies. Etym: [Gr. chronologie.]

Defn: The science which treats of measuring time by regular divisions or periods, and which assigns to events or transactions their proper dates. If history without chronology is dark and confused, chronology without history is dry and insipid. A. Holmes.

CHRONOMETER
Chro*nom"e*ter, n. Etym: [Gr. -meter: cf. F. chronomètre.]

1. An instrument for measuring time; a timekeeper.

2. A portable timekeeper, with a heavy compensation balance, and usually beating half seconds; — intended to keep time with great accuracy for use an astronomical observations, in determining longitude, etc.

3. (Mus.)

Defn: A metronome. Box chronometer. See under Box.
— Pocket chronometer, a chronometer in the form of a large watch.
— To rate a chronometer. See Rate, v. t.