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单词
preformationary
释义
WordReference Random House Unabridged Dictionary of American English © 2024
pre•for•ma•tion
(prē′fôr mā
′
shən),
USA pronunciation
n.
previous formation.
Biology
(formerly) the theory that the individual, with all its parts, preexists in the germ cell and grows from microscopic to normal proportions during embryogenesis (opposed to
epigenesis
).
pre
- +
formation
1725–35
pre′for•ma
′
tion•ar•y
,
adj.
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更新时间:2025/7/31 1:19:34