Glossary
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S
- saxicolous - living on rock
- saxitoxin - neurotoxin produced by dinoflagellate Gonyaulax
- seta - stiff hair, projection or bristle
- sieve area - field of pores through which translocation occurs as in brown algal order Laminariales
- sieve tube - longitudinal file of sieve elements as in brown alga Nereocystis
- silicoflagellate - Chrysophycean organism with silicious skeleton
- sorus - a group or cluster of reproductive structures
- spermatium - non-motile male gamete in Rhodophyta
- spore - cell which functions in reproduction but not as a gamete
- sporophyll - fertile, spore-producing blade as in brown algal order Laminariales
- sporophyte - the usually diploid spore-producting phase of a life history
- stellate - star-shaped
- stephanokont - with ring of flagella
- stichidia - specialized branch bearing tetrasporangia in some Rhodophyta, usually larger than vegetative branches
- stipe - stalk or erect portion as in brown algal order Laminariales
- stromatolite - fossilized, calcareous accumulation of Cyanobacteria
- sublittoral - below lowest low tide level
- supporting cell - cell bearig the carpogonial branch in Rhodophyta
- sympodial - mode of development where primary axis is continually replace by lateral axes which become temporarily dominant then are replaced by their own laterals
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