| harderian | <anatomy> A term applied to a lachrymal gland on the inner side of the orbit of many animals which have a third eyelid, or nictitating membrane. See Nictitating membrane, under Nictitate. Source: Websters Dictionary (01 Mar 1998) |
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| harderian gland | A sebaceous gland that, in some animals, acts as an accessory to the lacrimal gland. The harderian gland excretes fluid that facilitates movement of the third eyelid. (12 Dec 1998) |