Bailly
ou πτύελον, ου (τὸ) [ᾰ] salive, HPC.
Aph. 1243, etc. ; ARSTT.
H.A. 8, 29, 4, etc.
Étym. πτύον.
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LSJ
or πτύελον, τό, (< πτύω) sputum, saliva, Hp. Aph. 1.12 (-ελ-), Prog. 15 (-ελ-), Acut. 66 (-αλ-), al., Arist. HA 607a30, GA 747a10; — also πτύελος, ὁ, Id. EE 1235a38, LXX Jb. 7.19, Hsch. s.v. σίαλος. — The forms in πτυαλ- and πτυελ- are found in codd. of Hp. (v. Kuehlewein i p. cvi) and of later writers; in those of Arist. the latter only is found.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
τό, Speichel, Medic.; auch πτύελον, Arist. H.A. 8.29. Das masc. πτύαλος zw.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)