Quick Definition
ἀκρίς, ίδος, ἡ n.f. a locust
Strong's Definition
apparently from the same as 206; a locust (as pointed, or as lighting on the top of vegetation)
KJV Usage: locust
UBS Dictionary of the Greek New Testament
noun, f. | -ίδος
4.47 · Animals · Insects
grasshopper, locust six-legged winged insect characterized by the fact that its third pair of legs is elongated and adapted to hopping; Acrididae family; moves in swarms that migrate to new areas, which they colonize; at other times lives solitary or in small groups; eaten cooked by toasting, grilling, frying, or broiling, though in some places they are also eaten raw; because of their large numbers and swarming characteristics, locusts were a symbol of a vast attacking army against which there was no defense and also a symbol of divine punishment The four NT contexts in which ἀκρίς occurs refer to these insects either as being edible (MAT 3:4; MRK 1:6) or as being very destructive (REV 9:3).
Some persons have assumed that the reference to grasshoppers being eaten by John the Baptist should be understood not as the insects but as carob pods, but there is neither linguistic nor cultural evidence to support such an interpretation.
In a number of parts of the world there are different kinds of grasshoppers/locusts, some of which are edible, and others which are not edible. It is therefore important in the contexts of MAT 3:4 and MRK 1:6 to select a term which designates edible insects.
UBS Dictionary of the Greek New Testament © United Bible Societies, licensed CC BY-SA 4.0.
Thayer's Greek Lexicon
ἀκρίς, -idos, ἡ, [fr. Hom. down], a locust, particularly that species which especially infests oriental countries, stripping fields and trees. Numberless swarms of them almost every spring are carried by the wind from Arabia into Palestine, and having devastated that country migrate to regions farther north, until they perish by falling into the sea. The Orientals are accustomed to feed upon locusts, either raw or roasted and seasoned with salt [or prepared in other ways], and the Israelites also (acc. to Lev. xi. 22) were permitted to eat them; (cf. Win. RWB. s. v. Heuschrecken; Furrer in Schenkel iii. p. 78 sq.; [BB.DD.s. v.; Tristram, Nat. Hist. of the Bible, p. 813 sqq.]): Mt. iii. 4; Mk.i.6. A marvellous and infernal kind of locusts is described in Rev. ix. 3, 7, cf. 2, 5 sq. 8-12; see Diisterdieck ad loc.
Mounce Concise Greek Dictionary
ἀκρίς akris 4x
a locust, Mt. 3:4; Mk. 1:6; Rev. 9:3, 7*
Abbott-Smith Greek Lexicon
ἀκρίς, -ίδος, ἡ
[in LXX chiefly for אַרְבֶּה, also for חָגָב, etc.;]
a locust: Mt 3:4, Mk 1:6, Re 9:3, 7.†
Liddell-Scott-Jones — Greek-English Lexicon
ἀκρίς (akris) — locust. ἀκρίς, ίδος, ἡ, grasshopper, locust, cricket, [LXX+8th c.BC+]:— singular, in collective sense, Men.Prot.[Refs 4th c.AD+]