(n) foraminifer
foraminiferan
(n) (uk) (obsc) rotifers
rotatoria
(n) scrub typhus
tsutsugamushi disease
(n) reptiles
(n) (obsc) itch mite (Sarcoptes scabiei)
(n) (uk) true weevil (any weevil of family Curculionidae)
(n) cestodes
tapeworms
(n) (uk) cochineal insect (Dactylopius coccus)
(n) thorny-headed worm (any parasitic worm of phylum Acanthocephala)
(n) (uk) inocelliid snakefly (any insect of family Inocelliidae)
(n) (1) (uk) aphid
plant louse
(2) (obsc) cockroach
(3) (obsc) Japanese house bat (Pipistrellus abramus)
(4) hanger-on
parasite
(5) (arch) visitor to a red-light district who's only there to look
(n) someone who gets in the way without serving any useful purpose
fly in the ointment
buttinsky
third wheel
(n) fart bug
(n) (uk) rhinoceros beetle (esp. the Japanese rhinoceros beetle, Trypoxylus dichotomus)
(n) (obsc) striped stem borer larva
(n) (obsc) striped stem borer larva
(n) (uk) rice water weevil (Lissorhoptrus oryzophilus)
(n) ringworm (of the groin)
jock itch
tinea cruris
(n) (uk) American redstart (Setophaga ruticilla)
(n) (uk) cucurbit leaf beetle (Aulacophora femoralis)
(n) Metagonimus yokogawai (species of intestinal fluke)
(n) Protura (order of wingless insects)
(n) Protura (order of wingless insects)
(n) giardiasis
(n) grasshopper
(n) (uk) sweet potato weevil (Cylas formicarius)
(n) (uk) acorn worm (any hemichordate of class Enteropneusta)
(n) money loser
high-cost, low-return project
(n) (uk) chestnut weevil (Curculio dentipes)
(n) someone who gets in the way without serving any useful purpose
fly in the ointment
buttinsky
third wheel