裸名（nomen nudum）为拉丁词汇，意为“赤裸的名称”，用于分类学和植物学与动物学的命名。

该词是用于表示一个长得像学名，或是本来打算将其用作学名但没有使用的名称。因为该名称未与充分的描述一起被发表，所以是一个“裸体”的名称。其在正式的场合是不能接受的。

因为裸名没有正式学名的资格，所以之后的学者可以发表一个与其拼写相同的学名。如果同一个作者发表了一个名称，前一个被作为裸名，而后一个因含有符合标准的描述而被作为学名，那幺后者发表的日期将成名该名称的命名日期。

根据动物学命名法，裸名即是无效名；国际动物命名法规中有如下定义：

The phrase nomen nudum (plural nomina nuda) is a Latin term, meaning "naked name", used in taxonomy (especially in zoological and botanical nomenclature). It may or may not be written in italics, depending on style.

The term is used to indicate a designation which looks exactly like a scientific name of an organism, and may have originally been intended to be a scientific name, but fails to be one because it has not (or has not yet) been published with an adequate description (or a reference to such a description), and thus is a "bare" or "naked" name, one which cannot be accepted as it currently stands.