Lexical Definition

‎ψυχρός‎ psychrós (psoo-chros') cold G:A
from ‎ψύχος‎

cold.

Usage: 4 forms in 5 verses
Form Translated As     In Verse(s)
ψυχρὸσ cold Rev.3.15Rev.3.15
ψυχρόσ cold Rev.3.16
ψυχρόν cold LXX.Prov.25.25
ψυχροῦ of cold Matt.10.42

Abbott-Smith

ψυχρός, -ά, -όν (< ψύχω), [in LXX: Pr 25:25 (קַר), Si 43:20, IV Mac 11:26 * ;]
cold: sc. ὕδωρ (cf. Theogn., 263; Hdt., ii, 37), Mt 10:42; metaph., of indifferent persons, Re 3:15, 16

Abbott-Smith References

Book Refs
Proverbs 25:25
Matthew 10:42
Revelation 3:15 · 3:16

Liddell-Scott-Jones

ψυχρός, , όν,

cold, χάλαζα, νιφάδες, χιών, [Refs 8th c.BC+]; ψ. χαλκός (as we say 'cold steel') [Refs 8th c.BC+]; ψυχρόν (without ὕδωρ) [Refs 6th c.BC+] also ={ψῦχος}, cold, [Refs 5th c.BC+]: of the air, αὔρη ψ. [Refs 8th c.BC+]; ψ. βίος life in the cold, [Refs 5th c.BC+]; of cold meats, [Refs 2nd c.AD+]; of a snake, [Refs 3rd c.BC+]: comparative -ότερος[Refs 5th c.BC+]: superlative -ότατος[Refs 1st c.BC+]

__II metaphorically,
__II.1 ineffectual, vain, ἐπικουρίη ψ. [Refs 5th c.BC+]; θερμὴν ἐπὶ ψυχροῖσι καρδίαν ἔχεις a hot spirit in a cold business, [Refs]
__II.2 of feelings, ψ. τέρψις, ἐλπίς, [Refs 5th c.BC+]
__II.3 of persons, cold-hearted, heartless, indifferent, [NT+5th c.BC+]
__II.4 of flat, lifeless, insipid productions, τὸν Παλαμήδην (the play so named) ψυχρὸν ὄντ᾽ αἰσχύνεται [Refs 5th c.BC+]; ψ. καὶ ἀηδὴς [Μοῦσα] [Refs 5th c.BC+]: hence jokes in [Refs 5th c.BC+]; also of authors themselves, γίνεται ψυχρός [Refs 1st c.BC+]. adverb, δ᾽ αὖ Θέογνις ψυχρὸς ὢν ψυχρῶς ποιεῖ [Refs 5th c.BC+]; σκώψαντι ψ. ἐπιγελάσαι to laugh at a feeble joke, [Refs 5th c.BC+]
__II.5 silly, γραϊδίοις ψυχροῖς ὁμιλοῦντες [Refs 2nd c.AD+]; compare conversely μάκρα for μάκτρα (ψυχρός originally 'cooled by blowing' from ψύχω 'blow').]

LSJ Scripture Refs: Rev.3.15