Quick Definition
ῥύσις, εως, ἡ n.f. a flowing, an issue
Strong's Definition
from 4506 in the sense of its congener 4482; a flux (of blood)
KJV Usage: issue
UBS Dictionary of the Greek New Testament
noun, f. | -εως | ῥέω
14.17 · Physical Events and States · Events Involving Liquids and Dry Masses
to flow, a flow the movement of a liquid in some direction In a number of languages a term referring to the flow of liquid may also be applied to the movement of any object, so that a literal rendering might be ‘the liquid moved.’ However, terms for ‘flow’ or ‘pour’ often differ substantially on the basis of the direction of the flow. For example, if the flow is relatively horizontal, and therefore slow, it may have one term, while if it is quite fast, another expression may be used, and if the flow is almost perpendicular (as in the case of pouring), a still different term is employed.
1 It is possible to regard ῥέω ‘to flow’ and ῥύσις[a] ‘a flow or a flowing’ as being semantically distinct on the basis that one refers only to the event of flowing, while the second particularizes the event by assuming a specific beginning and end point and thus making it possible to speak of a number of such events. In English this type of semantic derivation is almost automatic between verbs and nouns, and it is widespread in Greek, though with obvious morphological differences. In a number of other languages, however, there is no corresponding noun form, and in order to speak of a series of events, one must simply say it flowed several times. 2 The expressions in 23.181 and 23.182 all refer to a menstrual flow of blood, but the phrases πηγὴ αἵματος and ῥύσις αἵματος seem to be restricted primarily to this meaning, while αἱμορροέω in non-biblical contexts means simply to suffer a loss of blood or to bleed, but it may, of course, refer to menstrual bleeding. Because of the wider range of reference in αἱμορροέω, this term has been listed separately.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ῥύσις, -ews, ἡ, (fr. an unused pres. ῥύω, from which several of the tenses of ῥέω are borrowed), a flowing, issue: τοῦ aipatos, Mk. v. 25; Lk. viii. 43, [on the two preced. pass. cf. B. § 147, 11; W. § 29, 3b.], 44, (Hippocr., Aristot.).
Mounce Concise Greek Dictionary
ῥύσις rhysis 3x
a flowing; a morbid flux, Mk. 5:25; Lk. 8:43, 44*
Abbott-Smith Greek Lexicon
ῥύσις, -εως, ἡ
(< ῥέω), [in LXX chiefly for זוֹב ;]
a flowing, issue: τ. αἵματος, Mk 5:25, Lk 8:43, 44.†
Moulton & Milligan — Vocabulary of the Greek NT
ῥύσις is very common of the ‘‘ flow” or ‘‘ yield” of wine at the vintage, see e.g. P Giss I. γοῖϊ 15. (c, a.p. 117) ἐὰν S]é 6 θε[ὸ]ς ἐπιτρέψῃ πολλὴν ῥύσιν [ἔσεσθαι εἰς ἔτους, τάχα διὰ τὴν ἐσομένην εὐϊωνίαν τοῦ γενήματος ἀθυμήϊσουσι ot γ]εοῦχοι, and the other exx. collected by the editor ad 1. The noun seems to have a different meaning in P Bad 1551 (i/B.c.) εἰπὲ δὲ τῆ ἀδελφῆ πέμψαι por τὴν ῥύσιν, ἵνα χειρογραφήσω. For its use in connexion with the ‘ flow” of blood, as in Mk 525, Lk 84%, see Vett. Val. p. 282%. ‘Purdy is applied to a drinking-horn in P Petr III. 42 Η (7) (c. B.C. 250) (= Witkowski’, p. 13). ports, “a wrinkle” of age, which in Biblical Greek is confined to Eph 527, may be illustrated from Plut. Afor. p. 789 D οἷς ἡ γελωμένη πολιὰ καὶ ῥυτὶς ἐμπειρίας μάρτυς ἐπιφαίνεται : see Armitage Robinson ad Eph /.c. “Ρωμαϊκός, ἐς Βοπιδη," as found in the TR of Lk 2338, may be illustrated from a Greek translation of an unknown Latin work made by a certain Isidorianus, P Ryl II. 62 (iii/A.p.), which ends—*f ᾿Ολύμπ[ιος] ᾿Ισ[ι]δωριανὸς [....... 1 ἑρμήνευσα ἀπὸ ἹῬωϊμα]ικῶν. ε “ Ῥωμαϊστί “ῬΡωμαϊστί, “in the Latin language ’’ (Jn 1930): cf. Epict. i. 17. 16 We ἐπισκέψαι, πῶς τοῦτο λέγεται, καθάπερ εἰ ἱἹΡωμαϊστί.
Liddell-Scott-Jones — Greek-English Lexicon
ῥύσις (rhusis) — discharge. ῥύσις [ῠ], εως, ἡ, (ῥέω) flow, ὕδατος [Refs 5th c.BC+]; εἰς τὸ κοιλότατον ἡ ῥ. [Refs 4th c.BC+]; opposed to ἄμπωτις,[Refs 5th c.BC+]; [ἐλαίου], i.e. yield of oil, [Refs 4th c.BC+]; φλεβῶν [Refs 4th c.BC+]; of fire, [Refs 4th c.BC+]; shedding, τριχῶν [Refs 1st c.AD+]; used for γονόρροια, [LXX]
II. course of a river, stream, ποταμὸς ποιεῖται τὴν ῥ. [Refs 2nd c.BC+]
III. in Mathematics texts, [στιγμῆς] ῥύσιν φασὶν εἶναι οἱ γεωμέτραι τὴν γραμμήν [Refs 3rd c.AD+]; οἷον ἄστρου ῥ. [Refs 4th c.BC+]