Quick Definition
a thistle
Strong's Definition
properly, a crow-foot (three-pronged obstruction in war), i.e. (by analogy) a thorny plant (caltrop)
Derivation: from G5140 (τρεῖς) and G956 (βέλος);
KJV Usage: brier, thistle
Thayer's Greek Lexicon
τρίβολος, τριβολου, ὁ (τρεῖς and βάλλω ((cf. βέλος), three-pointed)), a thistle, a prickly wild plant, hurtful to other plants: Mat_7:16; Heb_6:8. (Aristophanes, others; the Sept. for γΗΜψΐγΗΜψ, Gen_3:18; Hos_10:8; for φΐπΔιπΔιν thorns, Pro_22:5.) (Cf. B. D. under the word, Thorns and Thistles, 4; Löw, Aram. Pflanzennamen, § 302.)
Mounce Concise Greek Dictionary
τρίβολος tribolos 2x
pr. three-pronged; a thistle, thorn, Mat_7:16 ; Heb_6:8
Abbott-Smith Greek Lexicon
τρίβολος , -ου , ὁ ,
[in LXX : Gen_3:18 , Hos_10:8 ( H1863 ), 2Sa_12:31 ( H2757 ), Pro_22:5 ( H6791 ) * ;]
a thistle: Mat_7:16 , Heb_6:8 .†
Moulton & Milligan — Vocabulary of the Greek NT
τρίβολος [page 641]
thistle, Mat_7:16 , Heb_6:8 . In his comment on the latter passage ( ICC ad l .) Moffatt recalls Philo Leg. Allegor . 250 (ed. Cohn), where with reference to Gen_3:18 Philo plays with the derivation of the word (like trefoil ) ἕκαστον δὲ τῶν παθῶν τριβόλια εἴρηκεν , ἐπειδὴ τριττά ἐστιν , αὐτό τε καὶ τὸ ποιητικόν καὶ τὸ ἐκ τούτων ἀποτέλεσμα .
Liddell-Scott — Intermediate Greek Lexicon
τρίβολος τρί-^βολος, ον, [Etym: = τρι^βελής] as Subst. "a caltrop", i. e. "a three-spiked implement", formed so that one of the spikes must point upwards, used to lame the enemy's horses, Plut. "a prickly plant, a burr, thistle", NTest. τρίβολοι, οἱ, "a threshing-machine, boards with sharp stones fixed in the bottom", Anth.
STEPBible — Tyndale Abridged Greek Lexicon
τρίβολος, -ου, ὁ
[in LXX: Gen.3:18, Hos.10:8 (דַּרְדַּר), 2Ki.12:31 (חָרִיץ), Pro.22:5 (צֵן)* ;]
a thistle: Mat.7:16, Heb.6:8.†
(AS)