Lexical Definition

‎σίναπι‎ sínapi (sin'-ap-ee) mustard ^G:N-N
perhaps from (to hurt, i.e. sting)

mustard.

• mustard (the plant)

Abbott-Smith

† σίναπι, -εως, τό (prob. Egyptian), = Attic τὸ νᾶπυ
mustard: Mt 13:31 17:20, Mk 4:31, Lk 13:19 17:6.†

Abbott-Smith References

Liddell-Scott-Jones

σίναπι-ῐ, τό,

[Refs 4th c.BC+]; genitive εως [NT+2nd c.BC+]; ιος [Refs 3rd c.BC+]; ις [Refs 4th c.AD+]; dative ι [Refs 2nd c.AD+]; also σίνᾱπυ, [Refs 3rd c.BC+]; genitive υος [Refs 2nd c.AD+]; σίνηπι, [Refs 1st c.AD+]; genitive εως [Refs 3rd c.BC+]; ιος [Refs 2nd c.AD+]; σίνηπυ, [Refs 2nd c.BC+]; also σίνηπυς, accusative υν, ὁ, [Refs 2nd c.BC+], and σίνᾱπις, ἡ, Herod.middle in [Refs]:— mustard, Sinapis alba:—in early Attic dialect and Ionic dialect none of these forms appear, but νᾶπυ, [Refs 5th c.BC+]

__II σίνηπι ἄγριον or Περσικόν,= θλάσπι, Ps.-[Refs 1st c.AD+]
__III σ. κηπαῖον, Brassica nigra, [Refs]

_{LSJ Scripture Refs: Matt.13.31}