Acrocyst
Definition
A temporary spherical anatomical structure or protective vesicular sac formed during the reproduction of certain colonial hydrozoans, protecting eggs or planulae.
Bilingual Equivalents
- Acrocyst
- Brood sac
Grammatical & Source Details
| Inflection Type | Masculine noun adjusting systematically through standard singular, definite, and plural structural shifts. |
| Formation | Scientific compound borrowing from French 'acrocyste', blending the Greek prefixoid 'acro-' with the container noun root. |
| Spelling / Pronunciation | [a.kro.ˈt͡sist] |
| Source | Lexicon of Invertebrate Anatomy, Hydrozoan Development, and Cnidariology |
Contextual Usage Examples
RO: La această specie de meduză, un acrocist extern proeminează din gonotecă în perioada de reproducere.
EN: In this jellyfish species, an external acrocyst protrudes from the gonotheca during the breeding period.
RO: Cercetătorul a analizat membrana fină a unui acrocist la microscopul electronic.
EN: The researcher analyzed the thin membrane of an acrocyst under the electron microscope.
RO: Dezvoltarea larvară timpurie are loc în siguranță în interiorul acestui acrocist gelatinos.
EN: Early larval development takes place safely inside this gelatinous acrocyst.
Idioms & Phrases
Acrocist oviger / Ovigerous acrocyst / embryonic brood sac
RO: Vezică protectoare care reține ovulele fertilizate până când acestea ating stadiul de larvă înotătoare.
EN: A protective vesicle that retains fertilized eggs until they reach the swimming larva stage.
Formare de acrocist / Acrocyst formation / vesicular extrusion
RO: Proces morfologic de expulzare și umflare a structurii sacului în afara capsulei rigide a polipului.
EN: A morphological process of expulsion and swelling of the sac structure outside the polyp's rigid capsule.
Membrană de acrocist / Acrocyst membrane / protective envelope
RO: Înveliș exterior semipermeabil care permite schimbul de gaze cu apa de mare, protejând totodată embrionii.
EN: A semipermeable outer envelope that allows gas exchange with seawater while protecting the embryos.
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