What's the difference between feather and plumula?

Feather

Definition:

(n.) One of the peculiar dermal appendages, of several kinds, belonging to birds, as contour feathers, quills, and down.
(n.) Kind; nature; species; -- from the proverbial phrase, "Birds of a feather," that is, of the same species.
(n.) The fringe of long hair on the legs of the setter and some other dogs.
(n.) A tuft of peculiar, long, frizzly hair on a horse.
(n.) One of the fins or wings on the shaft of an arrow.
(n.) A longitudinal strip projecting as a fin from an object, to strengthen it, or to enter a channel in another object and thereby prevent displacement sidwise but permit motion lengthwise; a spline.
(n.) A thin wedge driven between the two semicylindrical parts of a divided plug in a hole bored in a stone, to rend the stone.
(n.) The angular adjustment of an oar or paddle-wheel float, with reference to a horizontal axis, as it leaves or enters the water.
(v. t.) To furnish with a feather or feathers, as an arrow or a cap.
(v. t.) To adorn, as with feathers; to fringe.
(v. t.) To render light as a feather; to give wings to.
(v. t.) To enrich; to exalt; to benefit.
(v. t.) To tread, as a cock.
(v. i.) To grow or form feathers; to become feathered; -- often with out; as, the birds are feathering out.
(v. i.) To curdle when poured into another liquid, and float about in little flakes or "feathers;" as, the cream feathers
(v. i.) To turn to a horizontal plane; -- said of oars.
(v. i.) To have the appearance of a feather or of feathers; to be or to appear in feathery form.

Example Sentences:

(1) These studies indicate that at each site of induction during feather morphogenesis, a general pattern is repeated in which an epithelial structure linked by L-CAM is confronted with periodically propagating condensations of cells linked by N-CAM.
(2) Sexually mature males have long, 'feathered' tails as compared with females.
(3) HVT-specific immunofluorescent antigen was detected in the feather follicle epithelium (FFE) and in the surface layer of the skin epidermis.
(4) This is a team who have found their feet after that winless group section, a side who have already seen off the much admired Croatia and who can ruffle the feathers of the hosts or the reigning world champions.
(5) The most consistently sensational evidence from Icac has been around former Labor member Eddie Obeid and the influence he wielded in the NSW Labor government to feather his own nest.
(6) However, feather loss (in one test) was associated with escape and avoidance behavior of groups; stepwise increases in fearfulness with increasing group size were associated with similar increases in loss of feathers.
(7) It may be just as well that Hugh Grant fervently believes a film succeeds on its qualities, not on publicity about its stars, because he did his tabloid reputation as a heartless, feather-brained Lothario immense harm in the process of delivering damning testimony on phone-hacking to the Leveson inquiry on Monday.
(8) If that effect existed in small animals, they would lose less heat if nude than if fur or feathers were present.
(9) Daily subcutaneous injection of L-dopa for 4 weeks into 2-year-old low egg production hens resulted in a lightening of feather color to snow white and increased oviduct and ovary weights and the development of well developed follicles.
(10) Hatched chicks were small and had pale feathers, skin, skeletal muscles, bone marrow, and viscera.
(11) During feather follicle formation, N-CAM was expressed in the dermal papilla and was closely apposed to the L-CAM-positive papillar ectoderm, while the dermal papilla showed no evidence of laminin or fibronectin.
(12) One hundred forty-two allergic children aged three to 18 years were studied for evaluation of the usefulness of skin testing with influenza vaccine as a means of identifying those children who could be immunized safely despite their allergies to chickens, eggs, or feathers.
(13) The Glasman "project" will undoubtedly ruffle feathers inside and outside Labour.
(14) Successful colonization and invasion of experimentally inoculated feathers required addition of moisture and elevation of relative humidity within the cultures.
(15) Injections of ovine prolactin during the pause-inducing procedure significantly reduced the subsequent rate of loss of primary wing feathers, suggesting that in certain physiological states, PRL may function to suppress molting.
(16) The endogenous virus, ev6, markedly reduced recovery of the endogenous virus (EV21) from plasmas of slow-feathering chickens.
(17) The very first collection we worked on together was called The Birds, and when he got the Givenchy job and we went to Paris, and he got to see what the Givenchy ateliers could do with feathers, he was just blown away.” The photographer Anne Deniau, who took many portraits of McQueen and whose camera was from 1997 to 2010 the only one allowed backstage at McQueen shows, felt that he loved “the lightness, the delicacy, of feathers.
(18) Retinal pigmented epithelium of White Leghorn chick embryos did not give rise to pigmentation of feather primordia in the hosts.
(19) The type of curve described by a feather is characteristic of its tensile properties and its degree of softness.
(20) Total amino acid flow to the duodenum was 19.3 and 15.6% higher for cows fed the feather meal and combined meal diets, respectively, compared with the soybean meal diet.