What's the difference between sewer and tortricid?

Sewer

Definition:

(n.) One who sews, or stitches.
(n.) A small tortricid moth whose larva sews together the edges of a leaf by means of silk; as, the apple-leaf sewer (Phoxopteris nubeculana)
(n.) A drain or passage to carry off water and filth under ground; a subterraneous channel, particularly in cities.
(n.) Formerly, an upper servant, or household officer, who set on and removed the dishes at a feast, and who also brought water for the hands of the guests.

Example Sentences:

(1) After visiting the H-blocks, the Catholic archbishop Cardinal Tomás Ó Fiaich compared the conditions to "the sewer pipes in the slums of Calcutta".
(2) Christmas 2013 caused 2,635 sewer blockages in Yorkshire alone.
(3) Soon, reformers known as “sanitarians” focused their attention on replacing the haphazard and unsanitary plumbing arrangements in homes and workplaces with technologically advanced public sewer systems.
(4) But nothing has been done about the stinking open sewers that run through the densely packed community and overflow whenever there is heavy rain.
(5) The use of self-topping aqua privies, discharging through sewers to oxidation ponds, has made possible the economic installation of water-carriage systems of waste disposal in low-cost high-density housing areas.In the oxidation ponds, typhoid bacteria appear to be more resistant than indicator organisms; helminths, cysts and ova settle out; there are no snails and, if peripheral vegetation is removed, mosquitos will not breed.
(6) Although the efficiency of the method was influenced by the composition and source of the sediments it was used successfully to detect viruses occurring in marine and freshwater sediments near sewer outfalls.
(7) In general, there is an improvement in chlorination, sewers and sewage-depuration equipment.
(8) Fatbergs build up on sewer roofs like mushy stalactites.
(9) In common usage, “myth” is at best the word we use to refer to amusingly preposterous urban legends – tales about albino alligators in the Manhattan sewers or the Holy Grail’s hiding place under the floor of a Paris shopping mall.
(10) No demographic risk factors were associated with the incidence of this disease including population density, median family income, crowding in housing units, percentage of households with public water supply, and percentage of households with public sewers.
(11) The apparent sources of these organisms were a residential storm sewer and a University of Wisconsin Experimental Farms' washwater drain.
(12) • Wipes, nappies, sanitary towels, rags and condoms do not break down easily and can snag on pipes, drains and the walls of sewers, leading to blockages.
(13) Inspection of the pool revealed significant plumbing defects which had allowed ingress of sewage from the main sewer into the circulating pool water.
(14) Paint and pesticides were disposed of by 10% of the households, but were dumped on the ground sewer or landfills more than 90% of the time.
(15) "So you've got open sewers, and shared toilets out in the open.
(16) Animals near the Los Angeles County sewer outfall contain over 45 times as much tDDT as animals near major agricultural drainage areas.
(17) But that’s for the future – a vast concrete sewer that may well be serviced by robots, or even drones.
(18) The effluent open sewer, situated in the north suburban district, drives into the sea the content of three maximum sewers that recollect domiciliary branches.
(19) They believed they wanted to take control and believed Britain would be better off … These kind of awful things are done by a minority who come from the sewers who want to exploit division and have their own racist agenda.” Map Halfon, who backed remain, added: “All of us need to stand up for tolerance and kindness and against any kind of division.” Police in Harlow have been given the power to order anyone involved in crime or harassment to leave The Stow.
(20) The effective energetic expenditure during a work shift was from 659 to 1020 kcal for weavers, from 740 to 1000 kcal for spinners and from 522 to 1105 kcal for sewers, which points to an uncomparable load at monomial workplaces equipped with different machines.