острица

• IPA^(key): [oˈstrit͡sɐ]

блатна острица (Carex riparia)

Inherited from Proto-Slavic *ostrica／*ostrika. Equivalent to о́стър (óstǎr, “sharp”) +‎ -ица (-ica).

остри́ца • (ostríca) f

1. sedge (graminoid flowering plant from family Cyperaceae, known for its sharp leaves)

   Synonym: бодли́ва трева́ (bodlíva trevá)

2. (particularly) true sedge of genus Carex

   Synonym: (dialectal) къ́ндра (kǎ́ndra)

• остри́ка (ostríka), остри́га (ostríga) — dialectal

• остре́ц (ostréc), острие́ (ostrié, “blade”)

• “острица¹”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• Georgiev, Vladimir I., Duridanov, I. V., editors (1995), “острица”, in Български етимологичен речник [Bulgarian Etymological Dictionary] (in Bulgarian), volumes 4 (мѝнго² – па̀дам), Sofia: Prof. Marin Drinov Pubg. House, →ISBN, page 948
• Nayden Gerov (1899) “остри́ца (1)”, in Рѣчникъ на Блъгарскꙑй язꙑкъ. Съ тлъкувание рѣчи-тꙑ на Блъгарскꙑ и на Русскꙑ. [Dictionary of the Bulgarian language]‎ (in Bulgarian), volume 3, Plovdiv: Дружествена печꙗтница "Съгласие.", page 392

червей острица

Borrowed from Russian остри́ца (ostríca, “pinworm”), probably a calque of the scientific name for the family Oxyuridae. Morphologically equivalent to Etymology 1.

остри́ца • (ostríca) f

1. pinworm (parasitic roundworm of genus Enterobius or more generally of family Oxyuridae)
2. (by extension) enterobiasis (disease caused by infection with pinworms)

• остри́к m (ostrík)

• “острица²”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014

риба острица

Similar to the other etymologies, apparently in reference to the spiky frame of the fish (which is also reflected in the other names for the species).

остри́ца • (ostríca) f

1. (dialectal) common perch (freshwater fish of genus Perca)

   Synonyms: косту́р (kostúr), бодлопе́рка (bodlopérka)

• остри́ка (ostríka)

• “острица³”, in Речник на българския език [Dictionary of the Bulgarian Language] (in Bulgarian), Sofia: Bulgarian Academy of Sciences, 2014
• Nayden Gerov (1899) “остри́ца (2)”, in Рѣчникъ на Блъгарскꙑй язꙑкъ. Съ тлъкувание рѣчи-тꙑ на Блъгарскꙑ и на Русскꙑ. [Dictionary of the Bulgarian language]‎ (in Bulgarian), volume 3, Plovdiv: Дружествена печꙗтница "Съгласие.", page 392

• IPA^(key): [ˈɔstrit͡sa]
• Rhymes: -it͡sa

острица • (ostrica) f

1. blade

• IPA^(key): [ɐˈstrʲit͡sə]

остри́ца • (ostríca) f anim (genitive остри́цы, nominative plural остри́цы, genitive plural остри́ц)

1. pinworm