What's the difference between feeder and weeder?

Feeder


Definition:

  • (n.) One who, or that which, gives food or supplies nourishment; steward.
  • (n.) One who furnishes incentives; an encourager.
  • (n.) One who eats or feeds; specifically, an animal to be fed or fattened.
  • (n.) One who fattens cattle for slaughter.
  • (n.) A stream that flows into another body of water; a tributary; specifically (Hydraulic Engin.), a water course which supplies a canal or reservoir by gravitation or natural flow.
  • (n.) A branch railroad, stage line, or the like; a side line which increases the business of the main line.
  • (n.) A small lateral lode falling into the main lode or mineral vein.
  • (n.) A strong discharge of gas from a fissure; a blower.
  • (n.) An auxiliary part of a machine which supplies or leads along the material operated upon.
  • (n.) A device for supplying steam boilers with water as needed.

Example Sentences:

  • (1) The early absolute but transient dependence of these A-MuLV mast cell transformants on a fibroblast feeder suggests a multistep process in their evolution, in which the acquisition of autonomy from factors of mesenchymal cell origin may play an important role.
  • (2) In cultures of medium ML-15 containing a feeder layer of Dog Sarcoma (DS) cells larvae successfully moulted and showed a small but significant increase in length.
  • (3) Type II cells cultured on floating feeder layers in medium containing 1% CS-rat serum and 10(-5) M hydrocortisone plus 0.5 mM dibutyryl cyclic AMP exhibited significantly increased incorporation of [14C]acetate into total lipids (238% of control).
  • (4) Dopamine, 5-hydroxydopamine (5-OHDA), 6-hydroxydopamine (6-OHDA), 5-hydroxytryptamine (5-HT), 5,6-dihydroxytryptamine (5,6-DHT) and 5,7-dihydroxytryptamine (5,7-DHT) killed the parasites in vitro, using a fibroblast feeder layer cell culture system, in four to 48 hours at concentrations of 10(-5)-10(-7) M. The 5-OHDA, 6-OHDA, 5,6-DHT and 5,7-DHT were also effective in vivo when tested by intraperitoneal injection of infected mice.
  • (5) This feeder cell system is proposed as an in vitro model for epithelial wound healing.
  • (6) Because ammocoetes are burrowing filter feeders, this startle behavior results in rapid withdrawal of the head into the burrow.
  • (7) This feeder layer technique is very simple and flexible and could have wide applicability.
  • (8) It turned out to require additional stimulation by hemopoietic feeder cells: by irradiated marrow cells and spleen cells if they possess megakaryocytes and platelets or by platelets from the blood.
  • (9) Keratinocytes were plated onto tissue culture dishes using one of three basic serum-free media protocols; a) with no feeder layer in keratinocyte growth medium (KGM); b) onto mitomycin C-treated 3T3 mouse embryo fibroblasts; or c) onto mitomycin C-treated dermal human fibroblasts.
  • (10) The alginate matrix permits efficient cloning in limited incubator space, without the use of a feeder layer, and with minimal amount of medium.
  • (11) Obliteration of the AVM was accomplished by therapeutic embolization with placement of coils or balloons in the feeder vessels.
  • (12) MCBFV in MCA on the feeder side was statistically significant higher in those patients with large AVM (greater than 4 cm) size (p less than 0.01).
  • (13) Usually it is not possible to cure DAVMs by embolization alone: the approach now used for the main feeders arising from branches of the internal carotid and vertebral arteries is inadequate.
  • (14) One hundred fifty feeder steers (mean body weight, 195 kg) were assigned to 1 of 3 transport groups and were deprived of feed and water (fasted) for 24 hours.
  • (15) The day of the experiment a microdialysis probe was inserted in the prefrontal cortex (PFC) of the rats and dialysates were collected every 20 minutes while the light and the feeder were off.
  • (16) The application of argon blue-green laser treatment at 0.1 watt for 60 seconds at two adjacent points on a feeder vessel was found to give rise to permanent vascular occlusion without causing complications.
  • (17) Whereas the cells from one patient formed colonies in the absence of exogenous stimuli, the cells from others were dependent on the addition of feeder leukocytes plus IL 2.
  • (18) Control CFU-GMs were also inhibited when they were cultured over feeder layers containing patients' BM cells (P less than .001).
  • (19) Such are the employability benefits associated with a Cambridge education that increasing numbers are sending their children to the various “ feeder schools ” around the city to boost their chances of a successful application.
  • (20) In the flocks included in the necropsy survey, annual mortality among adult and feeder sheep was estimated to be three percent.

Weeder


Definition:

  • (n.) One who, or that which, weeds, or frees from anything noxious.

Example Sentences:

  • (1) It is clear that all references to it which were in the files released on Friday have been obscured by Whitehall's weeders.
  • (2) Women are in a difficult position as both planters and weeders of maize and as caretakers of the ill AIDS patients.
  • (3) We can just start to build these things.” He thinks smaller-scale machines, such as laser weeders and drones, will have broader appeal than large-scale harvesting and sowing technology on farms today.
  • (4) Many of the files are redacted, with passages recently removed by Whitehall weeders.
  • (5) Official weeders have taken out some pages and passages, partly to protect the name of informants.
  • (6) Most patches and hand washes from applicators and weeders contained measurable amounts of glyphosate.
  • (7) The applicators, weeders, and scouts monitored all wore normal work clothing, which for applicators was a protective suit, rubber gloves and boots.

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