Quick Definition
a group of four soldiers
Strong's Definition
from G5064 (τέσσαρες)); a quaternion or squad (picket) of four Roman soldiers
Derivation: neuter of a presumed derivative of (a tetrad;
KJV Usage: quaternion
Thayer's Greek Lexicon
τετράδιον, τετραδιου, τό (τετράς, the number four), a quarternion (τό ἐκ τεσσάρων συνεστος, Suidas): τῶν στρατιωτῶν, a guard consisting of four soldiers (for among the Romans this was the usual number of the guard to which the custody of captives and prisons was intrusted; two soldiers were confined with the prisoner and two kept guard outside), Act_12:4, where the four quaternions mentioned were on guard one at a time during each of the four watches. (Philo in Flacc. § 13 i. e. Mang. edition vol. ii, p. 533, 25.)
Mounce Concise Greek Dictionary
τετράδιον tetradion 1x
a set of four; a detachment of four men, Act_12:4
Abbott-Smith Greek Lexicon
† τετράδιον , ου , τό ,
a quarternion, a group of four: στρατιωτῶν , Act_12:4 ( Philo ).
Moulton & Milligan — Vocabulary of the Greek NT
τετράδιον [page 632]
a group of four, applied to soldiers In Act_12:4 , has reference to days in the heathen amulet BGU III. 956 ( c . iii/A.D.) ἐξορκίζω ὑμᾶς . . ἀπὸ πα [ν ]τὸς . . πυρετοῦ . . ἡμερι <νοῦ > ἢ τετρ [α ]δ <ί >ο <υ >, and to sheets of parchment in P Oxy XVII. 2156 .10 (iv/v A.D.) τὴν διφθέραν [τ ]ῶν μεμβρανῶν ἐν τετραδίοις εἰκ [οσ ]ιπέντε , the skin of parchments in twenty-five quaternions (Ed.).
STEPBible — Tyndale Abridged Greek Lexicon
τετράδιον, ου, τό
a quarternion, a group of four: στρατιωτῶν, Act.12:4 (Philo).
(AS)