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Webster 1913 Edition

Pro thyalosoma

‖

Pro- thyˊa-lo-so′ma

,

Noun.

;

pl.

Prothyalosomata

(#)

.

[NL., fr. Gr.

πρῶτοσ

first +

ὕαλοσ

glass + [GREEK], [GREEK], body.]

(Biol.)

The investing portion, or spherical envelope, surrounding the eccentric germinal spot of the germinal vesicle.