[het-uh-ros-puh-ruh s, het-er-uh-spawr-uh s, -spohr-] /ˌhɛt əˈrɒs pə rəs, ˌhɛt ər əˈspɔr əs, -ˈspoʊr-/
having more than one kind of spore.
(of seed plants and some ferns and club mosses) producing megaspores and microspores Compare homosporous
Producing two types of spores differing in size and sex, the male microspore and the female megaspore, which develop into separate male and female gametophytes. All seed-bearing plants, as well as some ferns and other seedless plants, are heterosporous. Compare homosporous.
[het-uh-ros-puh-ree] /ˌhɛt əˈrɒs pə ri/ noun, Botany. 1. the production of both microspores and megaspores.
[het-uh-ros-truh-kuh n] /ˌhɛt əˈrɒs trə kən/ noun, Paleontology. 1. any of several ostracoderms of the order Heterostraci, from the Silurian and Devonian Periods, having the anterior part of the body enclosed in bony plates.
[het-er-uh-stahyld] /ˈhɛt ər əˌstaɪld/ adjective 1. (of a plant) having styles of different forms or lengths in the flowers.
/ˈhɛtərəˌstaɪlɪ/ noun 1. the condition in certain plants, such as primroses, of having styles of different lengths, each type of style in flowers on different plants, which promotes cross-pollination