haematodocha
noun
hae·ma·to·do·cha
ˌhēmətōˈdōkə,
ˌhem-,
hēˌmatəˈ-
plural -s
: a fibrous elastic sac in the palpus of male spiders that is distended with hemolymph during pairing
Word History
Etymology
New Latin, from hemat- + Greek dochē receptacle