See Also: planula(medicine)
planula(dictionary)
invaginate planula(medicine)

recession (iou) and planula (medicine)


recession (iou)



recession noun. M17.
[Latin recessio(n-) from recess-: see RECESS, -ION.]
a. The action or an act of receding from a place or point; withdrawal; rare a setting or going back in time. M17.
b. The action or an act of departing from some state or standard. M17.
c. The departure of a quality or property from that in which it exists. M17.
d. Phonetics. The transference of accentuation towards or on to the first syllable of a word. L19.
A receding part of a surface or object. M18.
Economics. A temporary decline in economic activity or prosperity. E20.
recessionary adjective of, pertaining to, or characterized by economic recession M20.

planula (medicine)


planula


Origin: L, a little plane.

1. <biology> 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. <zoology> The very young, free-swimming larva of the coelenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia.

Source: Websters Dictionary