English-Thai Dictionary
planula
N ตัวอ่อน มีข นที่ ว่ายน้ำ ได้ ของ สัตว์ จำพวก Coelenterate
Webster's 1913 Dictionary
PLANULA
Plan "u *la, n.; pl. Planulæ. Etym: [L., a little plane. ]
1. (Biol.)
Defn: In embryonic development, a vesicle filled with fluid, formed from the morula by the divergence of its cells in such a manner as to give rise to a central space, around which the cells arrange themselves as an envelope; an embryonic form intermediate between the morula and gastrula. Sometimes used as synonymous with gastrula.
2. (Zoöl.)
Defn: The very young, free-swimming larva of the coelenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.
New American Oxford Dictionary
planula
plan u la |ˈplanyələ ˈplænjələ | ▶noun ( pl. planulae |-ˌlē | ) Zoology a free-swimming coelenterate larva with a flattened, ciliated, solid body. ORIGIN late 19th cent.: modern Latin, diminutive of Latin planus ‘plane, flat. ’
Oxford Dictionary
planula
planula |ˈplanjʊlə | ▶noun ( pl. planulae |-liː | ) Zoology a free-swimming coelenterate larva with a flattened, ciliated, solid body. ORIGIN late 19th cent.: modern Latin, diminutive of Latin planus ‘plane, flat ’.
Duden Dictionary
Planula
Pla nu la Substantiv, feminin , die |Pl a nula |die Planula; Genitiv: der Planula, Plural: die Planulas lateinisch-neulateinisch platte, ovale, bewimperte, frei schwimmende Larve der Nesseltiere
The Wordsmith Dictionary