From BiblePortal Wikipedia

Vine's Expository Dictionary of NT Words [1]

1: Κῶλον (Strong'S #2966 — Noun Neuter — kolon — ko'-lon )

primarily denotes "a member of a body," especially the external and prominent members, particularly the feet, and so, a dead body (see, e.g., the Sept., in  Leviticus 26:30;  Numbers 14:29,32;  Isaiah 66:24 , etc.). The word is used in  Hebrews 3:17 , from  Numbers 14:29,32 .

2: Πτῶμα (Strong'S #4430 — Noun Neuter — ptoma — pto'-mah )

see Body , No. 3.

Easton's Bible Dictionary [2]

 Haggai 2:13 Numbers 19:16,22 Leviticus 11:39

Webster's Dictionary [3]

(n.) See Carcass.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [4]

( גְּוַיָּה , מִפֶּלֶת , נְּבֵלָה , פֶּגֶר , Πτῶμα ) , the dead body of a man or beast ( Joshua 8:29;  Isaiah 14:19;  Hebrews 3:17, etc.). According to the Mosaic law, any Israelite became ceremonially unclean until the evening (and in turn rendered whatever he touched unclean,  Haggai 2:14; comp.  Numbers 19:22), by (unwitting) contact, under any circumstances, with a dead animal of the "unclean" class ( Leviticus 5:2;  Leviticus 11:8 sq.; comp.  Deuteronomy 14:8), or with any "clean" animal, in case it had not been regularly slain according to the prescribed mode ( Leviticus 11:39 sq.). The eating of any (clean) beast that had died an accidental or natural death was still more strictly forbidden ( Leviticus 22:8; comp.  Ezekiel 4:14;  Ezekiel 44:31); but it might be sold as food to a foreigner ( Deuteronomy 14:2). Carrion was doubtless buried or burned. On the sepulture of persons found dead, (See Homicide). An unburied carcass ( Jeremiah 36:30;  Psalms 79:3) was considered by the ancients the height of indignity and misfortune (Virgil, Aen. 10:559). (See Burial). The Levitical enactments respecting all dead bodies evidently had their origin in sanitary reasons in a climate so liable to pestilence (Michaelis, Mos. Recht, 4:809 sq.). On the incident of the beehive in the skeleton ( Judges 14:8), (See Bee). On the allusion to the vulture's scent for putrid flesh,  Matthew 24:28 (Loder, De Cadavere Judaico, Ab Aquilis Romnanis Discerpendo, Argent. 1715; Rechenberg, De Adagio Christi, etc., Lips. 1696), (See Eagle).