preen oneself on - ορισμός. Τι είναι το preen oneself on
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Τι (ποιος) είναι preen oneself on - ορισμός

GLAND
Preen gland; Preen oil; Preen Gland; The Preen Gland
  • Blue Jay]]
  • Position of the uropygial gland, indicated on a [[budgerigar]]
  • [[Hoopoe]]s host symbiotic bacteria in their uropygial glands whose secretions act against feather-degrading bacteria.
  • preening]]. The bird on the left is pushing its head towards its uropygial gland.
  • [[White-winged crossbill]] (''Loxia leucoptera'') extracting preen oil from its uropygial gland.

preen         
WIKIMEDIA DISAMBIGUATION PAGE
Preen (disambiguation)
(preens, preening, preened)
1.
If someone preens themselves, they spend a lot of time making themselves look neat and attractive; used especially if you want to show that you disapprove of this behaviour or that you find it ridiculous and amusing.
50% of men under 35 spend at least 20 minutes preening themselves every morning in the bathroom...
Bill preened his beard.
VERB: V pron-refl, V n [disapproval]
2.
If someone preens, they think in a pleased way about how attractive, clever, or good at something they are.
She stood preening in their midst, delighted with the attention...
He preened himself on the praise he had received.
...a preening prize fighter about to enter a ring.
VERB: V, V pron-refl on n, V-ing [disapproval]
3.
When birds preen their feathers, they clean them and arrange them neatly using their beaks.
Rare birds preen themselves right in front of your camera.
VERB: V pron-refl, also V, V n
preen         
WIKIMEDIA DISAMBIGUATION PAGE
Preen (disambiguation)
¦ verb
1. (of a bird) tidy and clean its feathers with its beak.
2. (of a person) devote effort to making oneself look attractive.
3. (preen oneself) congratulate or pride oneself.
Derivatives
preener noun
Origin
ME: appar. a var. of obs. prune (based on L. ungere 'anoint'), in the same sense, assoc. with Scots and north. Engl. dialect preen 'pierce, pin' (because of the 'pricking' action of the bird's beak).
preen         
WIKIMEDIA DISAMBIGUATION PAGE
Preen (disambiguation)
v. (formal) (d; refl.) to preen oneself on ('to pride oneself on')

Βικιπαίδεια

Uropygial gland

The uropygial gland, informally known as the preen gland or the oil gland, is a bilobed sebaceous gland possessed by the majority of birds used to distribute the gland's oil through the plumage by means of preening. It is located dorsally at the base of the tail (between the fourth caudal vertebra and the pygostyle) and is greatly variable in both shape and size. In some species, the opening of the gland has a small tuft of feathers to provide a wick for the preen oil (see below). It is a holocrine gland enclosed in a connective tissue capsule made up of glandular acini that deposit their oil secretion into a common collector tube ending in a variable number of pores (openings), most typically two. Each lobe has a central cavity that collects the secretion from tubules arranged radially around the cavity. The gland secretion is conveyed to the surface via ducts that, in most species, open at the top of a papilla (nipple-like structure).