Reviewed: one independent reader; copy check clear.

blastula

blastula In historical usage, blastula names a stage of development in which the segmented ovum consists of the blastosphere.

In historical usage, blastula names a stage of development in which the segmented ovum consists of the blastosphere. It refers to that early embryonic stage rather than to a separate structure.

Also see

Sources

Drafting source: Baldwin Dictionary of Philosophy and Psychology, 1901. 1901 New York Macmillan original; archive index checked 2026-10-18. “Blastula” (Blastula).
public-domain-US · Definition uses new wording; original source retains its stated licence. · Source snapshot SHA-256: 8dd133c4cfa41d8e9710b5539cf59238665be3d7c993f2c9737761ce338b513e

These citations identify the drafting sources. 1/2 independent reader passes against the pinned source packet. The drafter does not count as a reader. Source institutions do not endorse this dictionary.

Cite this entry

PsychTerms (psychterms.org), CC BY 4.0, version 1. “blastula.” Development preview.

Version 1 · SHA-256: d1ffcb4d8521626a07c79feda4f21a637f42cec4587a2af3e0c5edc9aeb6b210

Edit this entry on GitHub