Definition of "dander"

dander¹

/ˈdændə(ɹ)/

noun
usually uncountable, plural danders
1. Dandruff—scaly white dead skin flakes from the human scalp.
2. Hair follicles and dead skin shed from mammals.
3. Allergen particles that accumulate on and may be shed from the skin and fur of domestic animals, especially from household pets such as cats and dogs.

dander²

/ˈdændə(ɹ)/

noun
plural danders
1. (chiefly Scotland) A cinder; (in the plural) the refuse of a furnace
2. (slang) Passion, temper, anger. Usually preceded by "have" or "get" and followed by "up".
  Quotations
  Don’t talk to me about daring to do this thing or t’other, or when my dander is up it’s the very thing to urge me on.
  1848 November – 1850 December, William Makepeace Thackeray, chapter 44, in The History of Pendennis. […], volumes (please specify |volume=I or II), London: Bradbury and Evans, […], published 1849–1850

dander³

/ˈdændə(ɹ)/

verb
third-person singular simple present danders, present participle dandering, simple past and past participle dandered
1. To wander about.
  Quotations
  So as neither of them were particularly pressed for time, as it happened, and the temperature refreshing since it cleared up after the recent visitation of Jupiter Pluvius, they dandered along past by where the empty vehicle was waiting without a fare or a jarvey
  1922 February, James Joyce, “[[Episode 16]]”, in Ulysses, Paris: Shakespeare and Company, […]
  "I'll have no more of it. I'll have no more Dinny Ryans handlin' flesh and blood of my gettin'. Ye'd see me dyin' for a sup of drink to give me peace, and you philanderin' and danderin' with yon scut of a fellow, and worse doin's behind that, if the truth is told."
  1938, Norman Lindsay, Age of Consent, 1st Australian edition, Sydney, N.S.W.: Ure Smith, published 1962, page 195
2. To maunder, to talk incoherently.