Quick Definition
πιότης, τητος, ἡ n.f. fatness
Strong's Definition
perhaps akin to the alternate of G4095 (πίνω) through the idea of repletion); plumpness, i.e. (by implication) richness (oiliness)
Derivation: from (fat;
KJV Usage: fatness
UBS Dictionary of the Greek New Testament
noun, f. | -ητος | πίων (fat, rich, fertile)
3.59 · Plants · Non-Fruit Parts of Plants
fatness, rich quality a nutritionally rich, fatty quality The text of ROM 11:17 is strange, for literally it reads ‘of the root of the richness.’ As may be easily understood, a number of scribal variations occur in different manuscripts.
Since the reference in ROM 11:17 is to the olive tree, the fruit of which produces so much oil, one can readily understand the basis for the extension of meaning. Some translations render πιότης simply as ‘sap’ (New English Bible), while others abandon completely the figure of speech, for example, TEV which has “you share the strong spiritual life.”
For another treatment of πιότης in ROM 11:17, see 65.7.
1 πιότης occurs in non-biblical Greek in the figurative sense of ‘wealth and riches,’ and it may be that in ROM 11:17 there is a blend of the conventional figurative meaning of ‘wealth’ with the more specific quality of fatness as exemplified by the fruit of the olive tree. See also 65.7 and footnote. 2 ROM 11:17 It is difficult to determine whether the expression συγκοινωνὸς τῆς ῥίζης τῆς πιότητος τῆς ἐλαίας in ROM 11:17 should be interpreted merely as an instance of an extended figurative use of related terms, or whether πιότης should be understood in a metaphorical sense of ‘value’ or ‘wealth,’ which it had already acquired in secular literature. If πιότης is to be understood in a figurative sense, then one is likewise justified in regarding ῥίζα in the figurative sense of ‘tradition’ and ἐλαία in this context as being a direct reference to Judaism.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
πιότης, -ητος, 1), (πίων fat), falness: Ro. xi. 17. tot., Theophr., al.; Sept. for 7071.)
Mounce Concise Greek Dictionary
πιότης piotēs 1x
fatness, richness, Rom. 11:17*
Abbott-Smith Greek Lexicon
πιότης, -ητος, ἡ
(< πίων, fat), [in LXX chiefly for דֶּשֶׁן;]
fatness: Ro 11:17.†
Moulton & Milligan — Vocabulary of the Greek NT
πιότης, ‘*fatness”” (Rom 1117): cf. Zest. χεΐ, patr. Levi viii. 8 ὃ πέμπτος κλάδον μοι ἐλαίας ἔδωκεν πιότητος.
Liddell-Scott-Jones — Greek-English Lexicon
πιότης (piotēs) — richness. πῑότης, ητος, ἡ, fattiness, τῆς σαρκός [Refs 5th c.BC+]
II. metaphorically, wealth, prosperity, [Refs 1st c.AD+]